| Date | Distance | Level | Club | Event | Area | Location Maps |
|---|
| Tomorrow | 658 km | Local | MAROC | Deeside Night Cup - last in the series - prizegiving meal | Bellwood | Google / Ordnance Survey * |
| Thu 25 Feb 2021 | 427 km | Local | WCOC | Winter series 15 | Mawbray | Google / Ordnance Survey |
| Sat 27 Feb 2021 | | Regional | NWOC | NI Colour Series 1 (Date to be rescheduled) | Drum Manor Country Park | |
| Sat 27 Feb 2021 | 61 km | Local | SN | Alice Holt Closed Event - Postponed - Placeholder date | Alice Holt Forest | Google / Ordnance Survey |
| Sun 28 Feb 2021 | 409 km | Local | WCOC | Copeland Chase (rescheduled nov 20 event) | Uldale Fells | Google / Ordnance Survey |
| Thu 4 Mar 2021 | | Local | EUOC | Fight With The Night 9: Inchplus | Inchplus | |
| Thu 4 Mar 2021 | | Local | EUOC | Fight With The Night 10: Whinny Hill | Whinny Hill | |
| Sat 6 Mar 2021 | 140 km | Local | NGOC | NGOC League | Barrow Wake | Google / Ordnance Survey * |
| Sat 6 Mar 2021 | 529 km | Local | INT | INT Local Events in Edinburgh and the Lothians 1 | Craigmillar Castle Woods | Google / Ordnance Survey |
| Sun 7 Mar 2021 | | Local | MAROC | Maroc local event | Muir of Dinnet | |
| Thu 11 Mar 2021 | 45 km | Local | SAX | SAX Kent Night Cup | West Malling & Leybourne | Google / Ordnance Survey * |
| Sat 13 Mar 2021 | 710 km | Local | MOR | Moravian Saturday and Schools League | Altyre, Forres | Google / Ordnance Survey * |
| Sun 14 Mar 2021 | | Regional | FERMO | NI Colour Series 2 (Date to be rescheduled) | Crossmurrin | |
| Wed 17 Mar 2021 | | Local | SWOC | SWOC Maprun Street Event 7 | Newport West | |
| Thu 18 Mar 2021 | 40 km | Local | DFOK | DFOK Kent Night Cup | Whitehorse Woods | Google / Ordnance Survey |
| Sat 20 Mar 2021 | 81 km | Local | WAOC | Park-O Coldhams Common | Abbey Leisure Complex | Google / Ordnance Survey * |
| Sat 20 Mar 2021 | 220 km | Local | SWOC | SWOC League 2 | Ty'n Y Coed Woods | Google / Ordnance Survey |
| Sat 20 Mar 2021 | | Regional | MA | Sprint Scotland 2021 | | |
| Sun 21 Mar 2021 | | Regional | SYO | YHOA SuperLeague | Canklow | |
| Sun 21 Mar 2021 | | Regional | SARUM | Sarum Saunter | Fonthill | |
| Sun 21 Mar 2021 | | Regional | NOR | Regional Event and Yvette Baker Heat | Whinney Hills | |
| Sun 21 Mar 2021 | | Regional | MA | Sprint Scotland 2021 | | |
| Sun 21 Mar 2021 | 391 km | Regional | WCOC | Cumbrian Galoppen | High Brow | Google / Ordnance Survey |
| Wed 24 Mar 2021 | 279 km | Local | SBOC | SBOC Park Series 1 | Millennium Coastal Park | Google / Ordnance Survey |
| Thu 25 Mar 2021 | 35 km | Local | SAX | SAX Kent Night Cup | Knole Park | Google / Ordnance Survey * |
| Fri 26 Mar 2021 | 562 km | Regional | LVO | NI Night Championships (To be rescheduled hopefully to Autumn 2021) | Portglenone Forest Park | Google * |
| Sat 27 Mar 2021 | | National | | CompassPoint Scottish Orienteering League | | |
| Sat 27 Mar 2021 | 276 km | Local | SBOC | SBOC Winter League 4 | Nicholaston & Penmaen | Google / Ordnance Survey |
| Sat 27 Mar 2021 | | Local | NWO | NWO Four Colour Event | TBC | |
| Sat 27 Mar 2021 | | Regional | DEE | Yvette Baker Heat Hightown Dunes | Hightown Dunes | |
| Sat 27 Mar 2021 | 38 km | Local | SAX | SAX Kent Orienteering League | Trosley CP | Google / Ordnance Survey * |
| Sat 27 Mar 2021 | | National | | English World Schools Selection Race | Bentley Wood tbc | |
| Sat 27 Mar 2021 | 527 km | Local | ELO | ELO Local Events in Edinburgh and the Lothians | Binning Wood | Google / Ordnance Survey |
| Sat 27 Mar 2021 | 109 km | Local | SOC | Sunset and Beyond | West Wood and Netley | Google / Ordnance Survey |
| Sun 28 Mar 2021 | 153 km | Local | OD | Yvette Baker Trophy Qualifier Inc WML - Bentley Wood (TBC) | Bentley Woods | Google / Ordnance Survey |
| Sun 28 Mar 2021 | | National | | CompassPoint Scottish Orienteering League | | |
| Sun 28 Mar 2021 | | Regional | SO | SO Regional event | Angmering Park | |
| Sun 28 Mar 2021 | 175 km | Local | BOK | BOK Local event | Pen Hill | Google / Ordnance Survey |
| Sun 28 Mar 2021 | 84 km | Regional | BADO | SCOLxx and BADO League Event | Blackwood | Google / Ordnance Survey |
| Sun 28 Mar 2021 | | Regional | AIRE | YHOA SuperLeague | Danefield | |
| Wed 31 Mar 2021 | 263 km | Local | SBOC | SBOC Park Series 2 & Park Lives event | Morriston Park | Google / Ordnance Survey |
| Sat 3 Apr 2021 | 325 km | National | CLOK | Acorn | West Sneaton | Google / Ordnance Survey |
| Sat 3 Apr 2021 | 372 km | Local | KERNO | Easter in Cornwall Day 1 (Closed event for those booked into Perran Sands Holiday Park) | Perran Sands Holiday Park | Google / Ordnance Survey |
| Sat 3 Apr 2021 | 538 km | Local | INT | INT Local Events in Edinburgh and the Lothians 2 | Polkemmet | Google / Ordnance Survey |
| Sun 4 Apr 2021 | | Regional | CLOK | Acorn Weekend | Pickering | |
| Sun 4 Apr 2021 | | National | LOK | LOK SE League event | Leith Hill | |
| Sun 4 Apr 2021 | 387 km | Local | KERNO | Easter in Cornwall Day 2 | Cornwall College Campus | Google / Ordnance Survey |
| Sun 4 Apr 2021 | 597 km | Local | TAY | Not the JK 2021 | Twenty Shilling Wood | Google / Ordnance Survey |
| Tue 6 Apr 2021 | 378 km | Local | KERNO | Easter in Cornwall Day 3 | Swanpool Car Park Falmouth | Google / Ordnance Survey |
| Wed 7 Apr 2021 | | Local | LOC | Middle Series 1 | Eggerslack Woods | |
| Wed 7 Apr 2021 | 263 km | Local | SBOC | SBOC Park Series 3 | Llewelyn Park | Google / Ordnance Survey |
| Thu 8 Apr 2021 | 312 km | Local | KERNO | Easter in Cornwall Day 4 | Mt Edgcumbe Country Park | Google / Ordnance Survey |
| Sat 10 Apr 2021 | | Local | DFOK | DFOK KOL 8 | Cobham & West Kent Downs | |
| Sat 10 Apr 2021 | 184 km | Regional | WIM | WIM SEOUL Poundbury | Bridport Road, Poundbury, Dorchester | Google / Ordnance Survey * |
| Sat 10 Apr 2021 | 33 km | Local | HH | HH Saturday Series Heartwood | Heartwood | Google / Ordnance Survey * |
| Sat 10 Apr 2021 | 162 km | Local | NGOC | NGOC League | Huntley (Castle & Bright's Hills) | Google / Ordnance Survey * |
| Sun 11 Apr 2021 | | Regional | LOG | East Midlands League 2021 | Stoke Rochford | |
| Sun 11 Apr 2021 | | Regional | WSX | Wessex South West Orienteering League and Yvette Baker Trophy qualifier | Rushmore | |
| Sun 11 Apr 2021 | | Regional | BKO | Concorde Chase 2021 | Cold Ash | |
| Sun 11 Apr 2021 | 49 km | Regional | BKO | SCOLxx BKO regional event and SCOA YBT Qualifier 2021 | Hawley & Hornley | Google / Ordnance Survey * |
| Sun 11 Apr 2021 | 17 km | Regional | HAVOC | Epping SW | Epping Forest South West | Google / Ordnance Survey |
| Wed 14 Apr 2021 | | Local | LOC | Middle Series 2 | Bell Wood TBC | |
| Wed 14 Apr 2021 | 267 km | Local | SBOC | SBOC Park Series 4 | Clyne Valley Country Park | Google / Ordnance Survey |
| Sat 17 Apr 2021 | 224 km | Regional | SWOC | SWOC Welsh Champs Weekend Middle distance | Merthyr Common | Google / Ordnance Survey |
| Sat 17 Apr 2021 | | Local | NOC | NOC - Out Sprint | Bestwood Estate | |
| Sat 17 Apr 2021 | | Regional | SROC | SROC middle distance | Blakeholme | |
| Sat 17 Apr 2021 | 521 km | Regional | LVO | NI Sprint Championships | Ulster University Jordanstown | Google * |
| Sat 17 Apr 2021 | 525 km | Regional | LVO | NI Middle Distance | Woodburn Forest Park | Google * |
| Sat 17 Apr 2021 | 711 km | Local | MOR | Moravian Saturday and Schools League | Darnaway -East | Google / Ordnance Survey * |
| Sun 18 Apr 2021 | 219 km | National | SWOC | SWOC Welsh Orienteering Championships | Merthyr Common | Google / Ordnance Survey |
| Sun 18 Apr 2021 | | Regional | EBOR | EBOR Regional Event | North Yorkshire Water Park | |
| Sun 18 Apr 2021 | 191 km | Local | QO | QO Forest League | Ham Hill | Google / Ordnance Survey |
| Sun 18 Apr 2021 | | Regional | LOC | Lakeland Weekend [POSTPONED] | Loughrigg | |
| Sun 18 Apr 2021 | | Regional | SWOC | Yvette Baker Qualifier & Cwpan Y Ddraig Competition | | |
| Sun 18 Apr 2021 | 43 km | Local | TVOC | TVOC Regional Event TBC | Keep Hill and Deangarden | Google / Ordnance Survey * |
| Sun 18 Apr 2021 | | Regional | DVO | EM Urban League 2021 | Belper | |
| Sun 18 Apr 2021 | 53 km | Regional | SOS | SOS Danbury Park | Danbury | Google / Ordnance Survey |
| Wed 21 Apr 2021 | 212 km | Local | HALO | Lincolnshire Poacher 1 - Osgoodby | Osgoodby Woods | Google / Ordnance Survey |
| Wed 21 Apr 2021 | | Local | SWOC | SWOC Maprun Street Event 8 | Heath | |
| Wed 21 Apr 2021 | | Local | LOC | Middle 3 | Force Forge TBC | |
| Wed 21 Apr 2021 | 252 km | Local | SBOC | SBOC Park Series 5 | Gnoll Country Park | Google / Ordnance Survey |
| Sat 24 Apr 2021 | | Local | SARUM | Sarum Urban event | Amesbury South | |
| Sat 24 Apr 2021 | 78 km | Local | WAOC | Park-O Lammas Land and Coe Fen | Lammas Land and Coe Fen | Google / Ordnance Survey * |
| Sat 24 Apr 2021 | 348 km | Regional | CLOK | Stockton Riverside Urban | Stockton Riverside | Google / Ordnance Survey |
| Sat 24 Apr 2021 | 525 km | Local | ELO | ELO Local Events in Edinburgh and the Lothians | Butterdean Wood | Google / Ordnance Survey |
| Sat 24 Apr 2021 | 219 km | Local | POTOC | potoc local event tbc | ladderedge country park | Google / Ordnance Survey |
| Sun 25 Apr 2021 | | Local | NWO | NWO Event | TBC | |
| Sun 25 Apr 2021 | | National | | CompassPoint Scottish Orienteering League | | |
| Sun 25 Apr 2021 | 173 km | Local | BOK | BOK Local event | Blaise Castle Estate | Google / Ordnance Survey |
| Sun 25 Apr 2021 | 92 km | Regional | WAOC | WAOC Urban Huntingdon | Huntingdon | Google / Ordnance Survey * |
| Sun 25 Apr 2021 | 401 km | Local | NATO | Newburn Local | Tyne Riverside Country Park | Google / Ordnance Survey |
| Sun 25 Apr 2021 | 381 km | Regional | BL | Knipe Scar Cumbrian Galoppen | Knipe Scar | Google / Ordnance Survey |
| Sun 25 Apr 2021 | | Regional | LEI | East Midlands League 2021 | Martinshaw Woods | |
| Wed 28 Apr 2021 | 227 km | Local | HALO | Lincolnshire Poacher 2 - Hendale | Hendale Woods | Google / Ordnance Survey |
| Wed 28 Apr 2021 | | Local | LOC | Middle 4 | Birkrigg | |
| Wed 28 Apr 2021 | 251 km | Local | SBOC | SBOC Park Series 6 | Diamond Park and Penrhos | Google / Ordnance Survey |
| Wed 28 Apr 2021 | | Local | BOK | BOK Urban Orienteering Series 1 | Oldland | |
| Fri 30 Apr 2021 | | International | | Irish Champs 30/4 to 3/5 | Southern Ireland | |
| Sat 1 May 2021 | | International | | Tio Mila 1-2 May | Sweden | |
| Sat 1 May 2021 | | Regional | WCOC | Cumbrian Galoppen | Dalegarth | |
| Sat 1 May 2021 | 535 km | Local | INT | INTLocal Events in Edinburgh and the Lothians 3 | Almondell | Google / Ordnance Survey |
| Sun 2 May 2021 | 241 km | Regional | SYO | Regional Event | Wombwell | Google / Ordnance Survey |
| Sun 2 May 2021 | | Regional | NOR | NOR Urban | | |
| Sun 2 May 2021 | | Regional | WCOC | Cumbrian Galoppen (potential upgrade to National event) | Dalegarth | |
| Wed 5 May 2021 | 228 km | Local | HALO | Lincolnshire Poacher 3 - Twigmoor Woods | Twigmoor Woods | Google / Ordnance Survey |
| Wed 5 May 2021 | | Local | ELO | ELO Sprintelope | | |
| Wed 5 May 2021 | 266 km | Local | SBOC | SBOC Summer League prologue | Singleton Park | Google / Ordnance Survey |
| Wed 5 May 2021 | | Local | BOK | BOK Urban Orienteering Series 2 | Horfield Common | |
| Sat 8 May 2021 | | Major | | British Orienteering Middle Championships | Summerhouse Knott | |
| Sat 8 May 2021 | 32 km | Local | HH | HH Saturday Series Stanborough | Stanborough | Google / Ordnance Survey * |
| Sun 9 May 2021 | | National | MDOC | Northern Championships | High Dam | |
| Sun 9 May 2021 | 80 km | Local | SUFFOC | Clare Country Park Summer Series | Clare Country Park | Google / Ordnance Survey * |
| Wed 12 May 2021 | 229 km | Local | HALO | Lincolnshire Poacher 4 - Mausoleum Woods | Mausoleum Woods | Google / Ordnance Survey |
| Wed 12 May 2021 | 267 km | Local | SBOC | SBOC Summer League prologue | Clyne Gardens | Google / Ordnance Survey |
| Wed 12 May 2021 | 188 km | Local | BOK | BOK Urban Orienteering Series 3 | Winscombe and Sidcot | Google / Ordnance Survey * |
| Thu 13 May 2021 | | International | | European Orienteering Championships & World Cup Rd 1 13 - 16 May | Switzerland | |
| Sat 15 May 2021 | | Local | SO | Sunny Sussex Weekend - Middle Distance | tbc | |
| Sat 15 May 2021 | | Local | SO | Sunny Sussex Weekend - Short Urban (evening) | tbc | |
| Sat 15 May 2021 | 78 km | Local | WAOC | Park-O Cherry Hinton Hall Park | Cherry Hinton Hall Park | Google / Ordnance Survey * |
| Sat 15 May 2021 | 207 km | Local | SWOC | SWOC League 3 | Pwll Du | Google / Ordnance Survey |
| Sat 15 May 2021 | 390 km | Local | BL | Gowbarrow | Gowbarrow, Ullswater | Google / Ordnance Survey |
| Sat 15 May 2021 | 108 km | Local | SUFFOC | Ipswich O Christchurch Park | Christchurch Park | Google / Ordnance Survey * |
| Sun 16 May 2021 | 184 km | Regional | BOK | BOK Regional event & Mike Nelson BOK Trot | Black Down | Google / Ordnance Survey |
| Sun 16 May 2021 | 82 km | Regional | SOS | Colchester Urban | Colchester | Google / Ordnance Survey |
| Sun 16 May 2021 | | National | SO | Sunny Sussex Weekend - National Event | Old House Warren | |
| Sun 16 May 2021 | | Regional | AIRE | Regional Event | Middleton Park | |
| Sun 16 May 2021 | 44 km | Local | BKO | SCOLxx and BKO Regional Event (Bloom Woods) | Bloom Wood | Google / Ordnance Survey |
| Sun 16 May 2021 | | Regional | CLOK | Regional Event and Yvette Baker Trophy Heat | Cringle Moor | |
| Sun 16 May 2021 | | Regional | DVO | East Midlands League 2021 | Calke Park | |
| Wed 19 May 2021 | 224 km | Local | HALO | Lincolnshire Poacher 5 - Swallow Vale | Swallow Vale | Google / Ordnance Survey |
| Wed 19 May 2021 | | Local | ELO | ELO Sprintelope | | |
| Wed 19 May 2021 | 269 km | Local | SBOC | SBOC Summer League 1 | Clyne Valley North | Google / Ordnance Survey |
| Sat 22 May 2021 | | International | | World Masters Orienteering Championships 22-29 May | Japan | |
| Sat 22 May 2021 | 196 km | Local | BOK | BOK Local event TBC | Weston Woods | Google / Ordnance Survey |
| Sat 22 May 2021 | | Regional | SBOC | 2021 Welsh League Race | Graig Fawr & Margam Park | |
| Sat 22 May 2021 | 35 km | Local | SAX | SAX Kent Orienteering League | Knole Park | Google / Ordnance Survey * |
| Sat 22 May 2021 | | Local | MOR | Moravian Saturday and School League | Culbin - East | |
| Sun 23 May 2021 | 50 km | Regional | HAVOC | Hadleigh Park SWELL | Hadleigh Park | Google / Ordnance Survey |
| Sun 23 May 2021 | | Regional | LEI | EM Urban League 2021 | Burbage Village | |
| Sun 23 May 2021 | | Regional | EPOC | Regional Event & YHOA School Champs | Fixby and Bradley | |
| Sun 23 May 2021 | 141 km | Local | NGOC | NGOC League - Urban Race | Cheltenham Town | Google / Ordnance Survey * |
| Sun 23 May 2021 | 403 km | Regional | NATO | Killingworth Urban | Killingworth | Google / Ordnance Survey |
| Sun 23 May 2021 | | National | TVOC | TVOC Chiltern Challenge National Event TBC | Hambleden | |
| Wed 26 May 2021 | 215 km | Local | HALO | Lincolnshire Poacher 6 - Normanby Le Wold | Normanby Le Wold | Google / Ordnance Survey |
| Wed 26 May 2021 | 262 km | Local | SBOC | SBOC Summer League 2 | Kilvey Hill west | Google / Ordnance Survey |
| Wed 26 May 2021 | | Local | BOK | BOK Urban Orienteering Series 4 | Keynsham | |
| Sat 29 May 2021 | | Regional | | Placeholder .... | | |
| Sat 29 May 2021 | | National | HOC | SINS 2021 Day 1 | | |
| Sat 29 May 2021 | | Local | ELO | ELO Local Events in Edinburgh and the Lothians | | |
| Sun 30 May 2021 | | Regional | | Placeholder ... | | |
| Sun 30 May 2021 | | National | WRE | SINS Day 2 and Midlands Champs (UKOL) | To be Confirmed | |
| Sun 30 May 2021 | | Regional | EBOR | YHOA SuperLeague | Raincliffe Woods | |
| Mon 31 May 2021 | | National | HOC | SINS 2021 Day 3 (UKOL) | | |
| Wed 2 Jun 2021 | 227 km | Local | HALO | Lincolnshire Poacher 7 - Weelsby Woods | Weelsby Woods | Google / Ordnance Survey * |
| Wed 2 Jun 2021 | | Local | ELO | ELO Sprintelope | | |
| Wed 2 Jun 2021 | 275 km | Local | SBOC | SBOC Summer League 3 | Cefn Bryn -East | Google / Ordnance Survey |
| Sat 5 Jun 2021 | 143 km | Local | NGOC | NGOC League - Middle Distance | Toadsmoor Woods | Google / Ordnance Survey * |
| Sat 5 Jun 2021 | 538 km | Local | INT | INTLocal Events in Edinburgh and the Lothians 4 | Dechmont Law | Google / Ordnance Survey |
| Sat 5 Jun 2021 | 108 km | Local | SUFFOC | Ipswich O Holywells Park | Holywells Park | Google / Ordnance Survey * |
| Sun 6 Jun 2021 | | Regional | CLARO | YHOA Middle Championships and YHOA SuperLeague | Plumpton | |
| Sun 6 Jun 2021 | 417 km | Regional | NATO | Sewingshields | Sewingshields | Google / Ordnance Survey |
| Sun 6 Jun 2021 | | Regional | NOC | EM Urban League 2021 | Retford | |
| Sun 6 Jun 2021 | 189 km | Local | BOK | BOK Regional Urban event | Clevedon | Google / Ordnance Survey |
| Sun 6 Jun 2021 | | Local | MAROC | Maroc SOUL | Banchory | |
| Wed 9 Jun 2021 | 254 km | Local | SBOC | SBOC Summer League 4 | Briton Ferry | Google / Ordnance Survey |
| Wed 9 Jun 2021 | 227 km | Local | HALO | Lincolnshire Poacher 8 - Hemswell | Weelsby Woods | Google / Ordnance Survey * |
| Wed 9 Jun 2021 | | Local | BOK | BOK Urban Orienteering Series 5 | Eastville & Stapleton | |
| Sat 12 Jun 2021 | | National | OD | Coventry Weekend Super Sprint Event (Provisional) | | |
| Sat 12 Jun 2021 | | Regional | | CompassPoint Scottish Orienteering League | | |
| Sat 12 Jun 2021 | 217 km | Local | SWOC | SWOC League 4 | Gwaelod y Garth | Google / Ordnance Survey |
| Sat 12 Jun 2021 | | Local | DFOK | DFOK KOL 10 | Lullingstone | |
| Sat 12 Jun 2021 | 398 km | Local | BL | Alston Urban | Alston | Google / Ordnance Survey |
| Sun 13 Jun 2021 | | National | OD | Coventry Urban European City Race Tour (Provisional) | Coventry City | |
| Sun 13 Jun 2021 | | National | ESOC | CompassPoint Scottish Orienteering League, incorporating Scottish Orienteering Championships | | |
| Sun 13 Jun 2021 | 119 km | Local | NWO | NWO Relay | Lydiard Park | Google / Ordnance Survey |
| Sun 13 Jun 2021 | | Regional | SOS | SOS The Broaks | | |
| Sun 13 Jun 2021 | 344 km | Regional | CLOK | Eston Moor Regional | Eston Moor | Google / Ordnance Survey |
| Sun 13 Jun 2021 | 357 km | Local | CLOK | Local Event | North Gare | Google / Ordnance Survey |
| Sun 13 Jun 2021 | | Local | BOK | BOK Local event | Stoke Park and Pur Down | |
| Wed 16 Jun 2021 | | Local | ELO | ELO Sprintelope (copy) | | |
| Wed 16 Jun 2021 | 285 km | Local | SBOC | SBOC Summer League 5 | Llanmadoc Hill | Google / Ordnance Survey |
| Wed 16 Jun 2021 | 234 km | Local | HALO | Lincolnshire Poacher 9 & LCS - Lodge Moor & Kingsway NR | Lodge Moor | Google / Ordnance Survey * |
| Wed 16 Jun 2021 | | Local | BOK | BOK Urban Orienteering Series 6 | Paulton | |
| Sat 19 Jun 2021 | | Major | DEE | British Sprint Relay Championships | Skelmersdale | |
| Sat 19 Jun 2021 | | International | | Jukola Relay 19-20 June | Finland | |
| Sat 19 Jun 2021 | | Local | MOR | Moravian Saturday and Schools League | | |
| Sun 20 Jun 2021 | | Major | | British Sprint Championships (UKOL) | Skelmersdale | |
| Sun 20 Jun 2021 | 107 km | Local | SUFFOC | Orwell Country Park Summer Series | Orwell Country Park | Google / Ordnance Survey * |
| Wed 23 Jun 2021 | 278 km | Local | SBOC | SBOC Summer League 6 | Oxwich Burrows | Google / Ordnance Survey |
| Wed 23 Jun 2021 | | Local | BOK | BOK Urban Orienteering Series 7 | Bristol harbourside? | |
| Sat 26 Jun 2021 | | Local | BOK | Adams-Avery & BOK Junior Relays (TBC) | TBC | |
| Sat 26 Jun 2021 | 92 km | Local | WAOC | Park-O Hinchingbrooke Country Park | Hinchingbrooke Country Park | Google / Ordnance Survey * |
| Sat 26 Jun 2021 | | Local | ELO | ELO Local Events in Edinburgh and the Lothians | | |
| Sun 27 Jun 2021 | | National | FVO | Harvester Relays - provisional | | |
| Sun 27 Jun 2021 | | Regional | HALO | YHOA Urban League | | |
| Sun 27 Jun 2021 | | Regional | MWOC | 2021 Welsh League Event | The Begwns | |
| Sun 27 Jun 2021 | | Local | TVOC | TVOC Urban Regional Event | Abingdon | |
| Sun 27 Jun 2021 | | Regional | WCOC | Cumbrian Galoppen | Sale Fell | |
| Sun 27 Jun 2021 | | Regional | DVO | East Midlands Championships 2021 | Chinley Churn | |
| Wed 30 Jun 2021 | | International | | World Schools Orienteering Championships 30 Jun-6 Jul | Serbia | |
| Wed 30 Jun 2021 | 266 km | Local | SBOC | SBOC Summer League 7 | Penllergaer | Google / Ordnance Survey |
| Wed 30 Jun 2021 | | Local | BOK | BOK Urban Orienteering Series 8 | Thornbury | |
| Sat 3 Jul 2021 | | International | | World Orienteering Championships 3-9 Jul | Czech Republic | |
| Sat 3 Jul 2021 | | Regional | SYO | YHOA Urban League date option 2 | | |
| Sat 3 Jul 2021 | 29 km | Local | HH | HH Saturday Series Highfield Park | Highfield Park | Google / Ordnance Survey * |
| Sun 4 Jul 2021 | 143 km | National | BOK | Yvette Baker Trophy Final | Westonbirt Arboretum | Google / Ordnance Survey |
| Sun 4 Jul 2021 | | Local | CHIG | GLOSS event | Wanstead Park | |
| Sun 4 Jul 2021 | 146 km | Regional | NGOC | NGOC League - Urban Race | Stroud Town | Google / Ordnance Survey * |
| Wed 7 Jul 2021 | 276 km | Local | SBOC | SBOC Summer League 8 | Nicholaston & penmaen | Google / Ordnance Survey |
| Wed 7 Jul 2021 | | Local | BOK | BOK Urban Orienteering Series 9 | Long Ashton | |
| Sun 11 Jul 2021 | | International | | Junior World Orienteering Championships 11-16 July | Turkey | |
| Sun 11 Jul 2021 | | Regional | SYO | YHOA Urban League | Sheffield | |
| Sun 11 Jul 2021 | 385 km | Regional | BL | Angle Tarn Pikes Cumbrian Galoppen | Angle Tarn Pikes | Google / Ordnance Survey |
| Sun 11 Jul 2021 | | Local | SARUM | Moonraker Relay | TBD | |
| Sun 11 Jul 2021 | 108 km | Local | SUFFOC | Ipswich O Christchurch Park | Christchurch Park | Google / Ordnance Survey * |
| Wed 14 Jul 2021 | | Local | SBOC | SBOC Summer League 9 | Pembrey | UNKNPC |
| Wed 14 Jul 2021 | | Local | BOK | BOK Urban Orienteering Series 10 | Congresbury | |
| Sat 17 Jul 2021 | | Regional | AIRE | Fat Rascal Weekend | Cottingley & Churwell | |
| Sat 17 Jul 2021 | | Regional | NWO | NWO Urban Event | Highworth | |
| Sun 18 Jul 2021 | 268 km | Regional | AIRE | Fat Rascal Weekend | Morley | Google / Ordnance Survey |
| Sun 18 Jul 2021 | 140 km | Regional | NGOC | A Day at the Races - Cheltenham Racecourse Sprint | Cheltenham Race Course | Google / Ordnance Survey * |
| Sun 18 Jul 2021 | 102 km | Local | SUFFOC | Royal Hospital School Summer Series | Holbrook | Google / Ordnance Survey * |
| Wed 21 Jul 2021 | 284 km | Local | SBOC | SBOC Summer League 10 | Whiteford Burrows | Google / Ordnance Survey |
| Wed 21 Jul 2021 | | Local | BOK | BOK Urban Orienteering Series 11 | Trowbridge East | |
| Sat 24 Jul 2021 | | Regional | EPOC | YHOA Urban League | Golcar | |
| Sat 24 Jul 2021 | 232 km | Local | SWOC | SWOC League 5 | Mynydd y Gaer | Google / Ordnance Survey |
| Sun 25 Jul 2021 | | Regional | EPOC | YHOA Urban League | Pontefract | |
| Sun 25 Jul 2021 | | Local | MA | Coast and Islands - Day 1 | | |
| Mon 26 Jul 2021 | | International | | O-Ringen 26-31 July | Sweden | |
| Mon 26 Jul 2021 | | Local | MA | Coast and Islands - Day 2 | | |
| Tue 27 Jul 2021 | | Local | MA | Coast and Islands - Day 3 | | |
| Wed 28 Jul 2021 | | Local | MA | Coast and Islands - Day 4 | | |
| Wed 28 Jul 2021 | | Local | BOK | BOK Urban Orienteering Series 12 | Chipping Sodbury & Yate | |
| Thu 29 Jul 2021 | | Local | MA | Coast and Islands - Day 5 | | |
| Fri 30 Jul 2021 | | Local | MA | Coast and Islands - Day 6 | | |
| Sun 1 Aug 2021 | | National | | Scottish 6 Days - Day 1 | | |
| Sun 1 Aug 2021 | 108 km | Local | SUFFOC | Ipswich O Holywells Park | Holywells Park | Google / Ordnance Survey * |
| Mon 2 Aug 2021 | | National | | Scottish 6 Days - Day 2 | | |
| Tue 3 Aug 2021 | | National | | Scottish 6 Days - Day 3 | | |
| Thu 5 Aug 2021 | | National | | Scottish 6 Days - Day 4 | | |
| Fri 6 Aug 2021 | | National | | Scottish 6 Days - Day 5 | | |
| Sat 7 Aug 2021 | | National | | Scottish 6 Days - Day 6 | | |
| Thu 12 Aug 2021 | | International | | World Cup Round 2 12 - 15 Aug | Sweden | |
| Sat 14 Aug 2021 | 410 km | Local | BL | Aughertree Fell | Aughtertree Fell | Google / Ordnance Survey |
| Sat 14 Aug 2021 | 143 km | Regional | NGOC | NGOC League | Sheepscombe | Google / Ordnance Survey * |
| Sun 15 Aug 2021 | | Regional | LOG | EM Urban League 2021 | Lincoln City | |
| Thu 19 Aug 2021 | | International | | European Youth Orienteering Championships 19-22 Aug | Lithuania | |
| Sat 21 Aug 2021 | 148 km | Local | NGOC | SW Summer Relay | Selsley Common | Google / Ordnance Survey * |
| Sat 21 Aug 2021 | 721 km | Local | MOR | Moravian Club AGM and Club Champs | Roseisle East, Burghead | Google / Ordnance Survey * |
| Sun 22 Aug 2021 | 76 km | Regional | SMOC | Milton Keynes summer urban | Great Linford | Google / Ordnance Survey * |
| Sat 28 Aug 2021 | | National | EBOR | White Rose | | |
| Sat 28 Aug 2021 | | Local | ELO | ELO Local Events in Edinburgh and the Lothians | | |
| Sun 29 Aug 2021 | | National | EBOR | White Rose and YHOA SuperLeague | | |
| Sun 29 Aug 2021 | | National | MV | National Urban Event | Leatherhead | |
| Mon 30 Aug 2021 | | Regional | EBOR | White Rose Relays | | |
| Sat 4 Sep 2021 | | National | GRAMP | CompassPoint Scottish Orienteering League incorporating Senior Home Internationals Relay | | |
| Sat 4 Sep 2021 | | Regional | AIRE | YHOA Urban League | Silsden | |
| Sat 4 Sep 2021 | | National | SLOW | City Of London Race | Kings College | |
| Sat 4 Sep 2021 | 378 km | Local | BL | Swindale North | Swindale North | Google / Ordnance Survey |
| Sat 4 Sep 2021 | 30 km | Local | HH | HH Saturday Series Verulamium | Verulamium | Google / Ordnance Survey * |
| Sat 4 Sep 2021 | | Local | QO | QO Club Championships | Wind Down | |
| Sun 5 Sep 2021 | | National | MAROC | CompassPoint Scottish Orienteering League incorporating Senior Home Internationals Individual | Balfour | |
| Sun 5 Sep 2021 | | National | AIRE | YHOA Championships and YHOA SuperLeague | Malham Moor | |
| Sun 5 Sep 2021 | | Regional | SUFFOC | Nowton and Hardwick | Nowton Park | |
| Wed 8 Sep 2021 | 288 km | Local | SBOC | SBOC Virtual Orienteering Event 1 | Parc Howard | Google / Ordnance Survey |
| Sat 11 Sep 2021 | | Local | PFO | Hot Pot Burnley Urban | Burnley | |
| Sat 11 Sep 2021 | | National | | CompassPoint Scottish Orienteering League | | |
| Sat 11 Sep 2021 | 339 km | Regional | CLOK | Urban Long Distant UK Urban Laegue | Richmond Town | Google / Ordnance Survey |
| Sat 11 Sep 2021 | 339 km | Local | CLOK | Easby Abbey Trail-O | Easby Abbey | Google / Ordnance Survey |
| Sun 12 Sep 2021 | 298 km | Regional | PFO | Hot Pot Pendle Hill | Pendle Hill | Google / Ordnance Survey |
| Sun 12 Sep 2021 | | Regional | CLARO | Regional Event | Timble | |
| Sun 12 Sep 2021 | | National | | CompassPoint Scottish Orienteering League | | |
| Sun 12 Sep 2021 | | Regional | SWOC | 2021 Welsh League Race | Llangynidr | |
| Sun 12 Sep 2021 | 82 km | Regional | WAOC | Cambridge North Urban | Cambridge North | Google / Ordnance Survey * |
| Sun 12 Sep 2021 | | Local | NOR | NOR Try O | | |
| Sun 12 Sep 2021 | | National | WCOC | Peter Palmer Junior Team Relays | Hawes End | |
| Sun 12 Sep 2021 | | Regional | CLOK | Urban Middle Distance | Catterick Garrison | |
| Sun 12 Sep 2021 | | Regional | NOC | EM Urban League 2021 | Southwell | |
| Sun 12 Sep 2021 | | Local | NWO | NWO Four Colour Event | TBC | |
| Sun 12 Sep 2021 | 409 km | Regional | NATO | Cramlington Urban | Cramlington | Google / Ordnance Survey |
| Wed 15 Sep 2021 | 267 km | Local | SBOC | Swansea Sprint Series 1 | West Cross | Google / Ordnance Survey |
| Sat 18 Sep 2021 | 129 km | National | WIM | Caddihoe Day 1 (UKOL) | Godshill, New Forest | Google / Ordnance Survey |
| Sat 18 Sep 2021 | 131 km | Regional | WIM | WIM SEOUL Short Urban | Fordingbridge, Hampshire | Google / Ordnance Survey * |
| Sat 18 Sep 2021 | 658 km | Local | MA | Skyline Scotland Urban/Sprint Race incorporating SOUL (tbc) | | Google / Ordnance Survey * |
| Sat 18 Sep 2021 | 717 km | Local | MOR | Moravian Saturday and Schools League | Culbin - West | Google / Ordnance Survey * |
| Sun 19 Sep 2021 | | Regional | SYO | Regional Event | Treeton (new area possible) | |
| Sun 19 Sep 2021 | | Regional | SOS | SOS Baddow Ridge | | |
| Sun 19 Sep 2021 | | Regional | LOC | Galoppen | Troutal | |
| Sun 19 Sep 2021 | 129 km | National | WIM | Caddihoe Day 2 (UKOL) | Hampton Ridge, New Forest | Google / Ordnance Survey |
| Wed 22 Sep 2021 | 263 km | Local | SBOC | SBOC Virtual Orienteering Event 2 | Llewellyn Park | Google / Ordnance Survey |
| Sat 25 Sep 2021 | 352 km | National | CLOK | Junior Inter Regional Championships Long Distance and October Odyssey | South Gare | Google / Ordnance Survey |
| Sat 25 Sep 2021 | | Local | ELO | ELO Local Events in Edinburgh and the Lothians | | |
| Sat 25 Sep 2021 | | Local | STAG | STAG/AYROC Ayrshire Weekend - Event 1/2 - SOUL | | |
| Sat 25 Sep 2021 | 165 km | Regional | NGOC | NGOC League | Blakeney | Google / Ordnance Survey * |
| Sun 26 Sep 2021 | 344 km | National | CLOK | Junior Inter Regional Championships Relays and October Odyssey | Eston Moor | Google / Ordnance Survey |
| Sun 26 Sep 2021 | 33 km | Regional | HAVOC | Hartswood EAL | Hartswood & Thorndon North | Google / Ordnance Survey |
| Sun 26 Sep 2021 | 378 km | Local | BL | Bampton and Askham Long-O | Bampton and Askham Commons | Google / Ordnance Survey |
| Sun 26 Sep 2021 | | Regional | DVO | East Midlands League 2021 | Kedleston Hall | |
| Sun 26 Sep 2021 | | Local | STAG | AYROC/STAG Ayrshire Weekend - Event 2/2 - SOUL | | |
| Sun 26 Sep 2021 | 98 km | Regional | TVOC | TVOC Urban Regional Event | Witney | Google / Ordnance Survey * |
| Wed 29 Sep 2021 | 267 km | Local | SBOC | Swansea Sprint Series 2 | Tir Coed | Google / Ordnance Survey |
| Thu 30 Sep 2021 | | International | | World Cup Round 3 30 Sept - 3 Oct | Italy | |
| Sat 2 Oct 2021 | 104 km | Regional | WAOC | Bush Heath (UKOL) | Bush Heath | Google / Ordnance Survey * |
| Sat 2 Oct 2021 | 32 km | Local | HH | HH Saturday Series Jersey Farm | Jersey Farm | Google / Ordnance Survey * |
| Sun 3 Oct 2021 | 101 km | Regional | SUFFOC | Bury St Edmunds (UKOL) | Bury St Edmunds | Google / Ordnance Survey |
| Sun 3 Oct 2021 | | Regional | LEI | EM Urban League 2021 Shepshed | Shepshed | |
| Sun 3 Oct 2021 | | Regional | EBOR | YHOA Urban League | Burnholme and Heworth | |
| Wed 6 Oct 2021 | 263 km | Local | SBOC | SBOC Virtual Orienteering Event 3 | Morriston Park | Google / Ordnance Survey |
| Sat 9 Oct 2021 | | International | | 25manna | Sweden | |
| Sat 9 Oct 2021 | | National | EPOC | British Schools Score Championships | Storthes Hall | |
| Sat 9 Oct 2021 | | Regional | ERYRI | 2021 Welsh League Event | Llyn Trawsfynedd, Gwynedd | |
| Sat 9 Oct 2021 | 187 km | Local | BOK | BOK Local event | Clevedon Court Estate | Google / Ordnance Survey * |
| Sat 9 Oct 2021 | | National | SLOW | Junior Home Internationals Individual | Hindhead | |
| Sat 9 Oct 2021 | | Regional | DEE | DEE Urban Week End Park Sprint | Queen's Park Crewe | |
| Sat 9 Oct 2021 | | Regional | DEE | DEE Urban Week End Night Sprint | Rease Heath College | |
| Sat 9 Oct 2021 | | Local | SARUM | Sarum Saturday | New Forest area | |
| Sun 10 Oct 2021 | | National | SAX | National Urban Event | Whitstable | |
| Sun 10 Oct 2021 | | Regional | ERYRI | 2021 Welsh League Event | Llyn Trawsfynedd, Gwynedd | |
| Sun 10 Oct 2021 | | National | SLOW | Junior Home Internationals Relays | Hankley | |
| Sun 10 Oct 2021 | | Regional | LOG | EM Urban League 2021 | TBC Urban | |
| Sun 10 Oct 2021 | 253 km | National | DEE | DEE Urban Week End Northwich Urban Race (UKUL) | Northwich Town Centre | Google / Ordnance Survey |
| Sun 10 Oct 2021 | | Local | NWO | NWO Four Colour Event | TBC | |
| Wed 13 Oct 2021 | 267 km | Local | SBOC | Swansea Sprint Series 3 | Mumbles | Google / Ordnance Survey |
| Sat 16 Oct 2021 | 421 km | Regional | BL | Carlisle Urban | Carlisle | Google / Ordnance Survey |
| Sat 16 Oct 2021 | | Regional | FERMO | NI Orienteering Championships 2021 (TBC) | The Cavan Burren | |
| Sat 16 Oct 2021 | 171 km | Local | NGOC | NGOC League | Bixslade | Google / Ordnance Survey * |
| Sun 17 Oct 2021 | | Major | DVO | CompassSport Cup Final for 2020 | Chatsworth | |
| Sun 17 Oct 2021 | | Local | QO | QO Forest League | | |
| Wed 20 Oct 2021 | 252 km | Local | SBOC | SBOC Virtual Orienteering Event 4 | Gnoll Country Park | Google / Ordnance Survey |
| Sat 23 Oct 2021 | | National | | CompassPoint Scottish Orienteering League | | |
| Sat 23 Oct 2021 | 719 km | Local | MOR | Moray Mix - SOUL | Lossiemouth | Google / Ordnance Survey * |
| Sun 24 Oct 2021 | | Regional | HALO | YHOA Urban League | | |
| Sun 24 Oct 2021 | | National | | CompassPoint Scottish Orienteering League | | |
| Sun 24 Oct 2021 | | Regional | GO | GO Urban Event | Guildford | |
| Sun 24 Oct 2021 | 339 km | Regional | KERNO | SW League Event 1 | Lanhydrock | Google / Ordnance Survey |
| Sun 24 Oct 2021 | 718 km | Local | MOR | Moray Mix - Lossie Forest | Lossie Forest | Google / Ordnance Survey * |
| Wed 27 Oct 2021 | 262 km | Local | SBOC | Swansea Sprint Series 4 | Swansea Marina | Google / Ordnance Survey |