| Kings Forest TREC – Summer 2021 Competition | 21/05/2021 | 01/04/2021 | 10/05/2021 | East Anglia TREC Group | Summer Series 2021 | 1, 2, 2a, 3 | Provisional | east-anglia | ss21 summer-series | provisional |
| Gower Spring TREC Summer 2021 Competition | 01/04/2021 | 01/03/2021 | 22/03/2021 | Red Kite TREC Group | Summer Series 2021 | 1, 2, 2a | Provisional | red-kite | ss21 summer-series | provisional |
| Wernham Farm – Summer 2021 Competition | 28/05/2021 | 01/04/2021 | 16/05/2021 | Wessex TREC Club | Summer Series 2021 | 1, 2, 2a, 3 | Provisional | wessex | ss21 summer-series | provisional |
| Oxlease Farm – Summer 2021 Competition | 26/06/2021 | 15/05/2021 | 01/06/2021 | Wessex TREC Club | Summer Series 2021 | 1 | Provisional | wessex | ss21 summer-series | provisional |
| Harwood Dale TREC, North Yorkshire, Summer 2021 Competition | 04/06/2021 | 01/05/2021 | 21/05/2021 | White Horse TREC Group | Summer Series 2021 | 1, 2, 2a, 3, 4 | Provisional | whtg | ss21 summer-series | provisional |
| Walford College Winter Competition | 16/01/2021 | 16/12/2020 | 09/01/2021 | TRAC (TREC Riders Association Cymru) | Winter Series 2020-21 | | Awaiting Schedule | trac | ws20-21 winter-series | awaiting-schedule |
| Walford College Winter Competition | 20/02/2021 | 27/01/2021 | 13/02/2021 | TRAC (TREC Riders Association Cymru) | Winter Series 2020-21 | | Awaiting Schedule | trac | ws20-21 winter-series | awaiting-schedule |
| Gracelands Winter Competition | 28/03/2021 | 28/02/2021 | 20/03/2021 | TRAC (TREC Riders Association Cymru) | Winter Series 2020-21 | | Awaiting Schedule | trac | ws20-21 winter-series | awaiting-schedule |
| Cavalier Centre Winter Competition | 03/04/2021 | 03/03/2021 | 27/03/2021 | TRAC (TREC Riders Association Cymru) | Winter Series 2020-21 | | Awaiting Schedule | trac | ws20-21 winter-series | awaiting-schedule |
| EAT Beechwood Winter Competition | 21/02/2021 | 21/01/2021 | 12/02/2021 | East Anglia TREC Group | Winter Series 2020-21 | | Awaiting Schedule | east-anglia | ws20-21 winter-series | awaiting-schedule |
| Barnetby TREC -Summer 2021 Competition | 12/06/2021 | 05/04/2021 | 28/05/2021 | TREC Lincolnshire | Summer Series 2021 | 1, 2, 2a | Provisional | lincs | ss21 summer-series | provisional |
| Oasby TREC – Summer 2021 Competition | 17/07/2021 | 05/04/2021 | 02/07/2021 | TREC Lincolnshire | Summer Series 2021 | 1, 2, 2a, 3 | Provisional | lincs | ss21 summer-series | provisional |
| Tumpy Green Winter Series Competition | 07/02/2021 | 07/12/2020 | 29/01/2021 | Wessex TREC Club | Winter Series 2020-21 | | Entries Open | wessex | ws20-21 winter-series | entries-open |
| Willow Farm Winter Competition POSTPONED | 02/01/2021 | 02/11/2020 | 21/12/2020 | South East TREC Group | Winter Series 2020-21 | | POSTPONED | setg | ws20-21 winter-series | postponed |
| Willow Farm Winter Competition | 06/02/2021 | 06/12/2020 | 29/01/2021 | South East TREC Group | Winter Series 2020-21 | | Awaiting Schedule | setg | ws20-21 winter-series | awaiting-schedule |
| Willow Farm Winter Competition | 06/03/2021 | 06/02/2021 | 26/02/2021 | South East TREC Group | Winter Series 2020-21 | | Awaiting Schedule | setg | ws20-21 winter-series | awaiting-schedule |
| Sands Farm EC Winter Competition CANCELLED | 10/01/2021 | 10/11/2020 | 01/01/2021 | South East TREC Group | Winter Series 2020-21 | | CANCELLED | setg | ws20-21 winter-series | cancelled |
| Sands Farm EC Winter Competition | 21/03/2021 | 21/01/2021 | 12/03/2021 | South East TREC Group | Winter Series 2020-21 | | Awaiting Schedule | setg | ws20-21 winter-series | awaiting-schedule |
| Scottish Championships – Fife – Summer 2021 Competition | 25/06/2021 | 30/04/2021 | 11/06/2021 | TREC Scotland | Summer Series 2021 | 1, 2, 2a, 3, 4 | Provisional | trec-scotland | ss21 summer-series | provisional |
| Central Moulton 2 – Winter Competitions RE-SCHEDULED | 28/03/2021 | 13/09/2020 | 21/03/2021 | Central TREC Group | Winter Series 2020-21 | | Entries Open | central | ws20-21 winter-series | entries-open |
| Central Moulton 3 – Winter Competitions | 10/01/2021 | 13/09/2020 | 31/12/2020 | Central TREC Group | | | Entries Open | central | | entries-open |
| Central Moulton 4 – Winter Competitions | 28/02/2021 | 13/09/2020 | 18/02/2021 | Central TREC Group | Winter Series 2020-21 | | Entries Open | central | ws20-21 winter-series | entries-open |
| Welsh Championships – Bryn Sion – Summer 2021 Competiton – CANCELLED | 15/05/2021 | 01/03/2021 | 24/04/2021 | TRAC (TREC Riders Association Cymru) | Summer Series 2021 | 2, 2a, 3, 4 | CANCELLED | trac | ss21 summer-series | cancelled |
| TRAC Nesscliffe TREC Summer 2021 Competition | 18/09/2021 | 01/07/2021 | 28/08/2021 | TRAC (TREC Riders Association Cymru) | Summer Series 2021 | 1 | Provisional | trac | ss21 summer-series | provisional |
| Tugford TREC, Summer 2021 Competition | 11/09/2021 | 01/07/2021 | 28/08/2021 | TRAC (TREC Riders Association Cymru) | Summer Series 2021 | 1, 2, 2a, 3 | Provisional | trac | ss21 summer-series | provisional |
| EATG Finchingfield Winter Competition | 28/03/2021 | 04/01/2021 | 19/03/2021 | East Anglia TREC Group | Winter Series 2020-21 | | Awaiting Schedule | east-anglia | ws20-21 winter-series | awaiting-schedule |
| NEST Ladyleys Winter Competition | 20/12/2020 | 24/09/2020 | 11/12/2020 | North East Scotland TREC | Winter Series 2020-21 | | Entries Open | nest | ws20-21 winter-series | entries-open |
| SET The Croft Winter Competition | 07/03/2021 | 07/02/2021 | 04/03/2021 | South East TREC Group | Winter Series 2020-21 | | Entries Open | setg | ws20-21 winter-series | entries-open |
| SOS TREC Hyndshawland Winter Competition 4 | 23/01/2021 | 14/12/2020 | 21/01/2021 | South of Scotland TREC | Winter Series 2020-21 | | Awaiting Schedule, Entries Open | sos | ws20-21 winter-series | awaiting-schedule entries-open |
| SOS TREC Hyndshawland Winter Competition 5 | 20/02/2021 | 25/01/2021 | 18/02/2021 | | Winter Series 2020-21 | | Awaiting Schedule, Entries Open | | ws20-21 winter-series | awaiting-schedule entries-open |
| Wessex Lacock Equestrian Centre Winter Series – Venue/Date Change | 24/01/2021 | 01/12/2020 | 14/01/2021 | Wessex TREC Club | Winter Series 2020-21 | | Awaiting Schedule, Entries Open | wessex | ws20-21 winter-series | awaiting-schedule entries-open |
| TREC Lincolnshire LRAC Kenwick Winter Competition | 21/02/2021 | 24/01/2021 | 14/02/2021 | TREC Lincolnshire | Winter Series 2020-21 | | Entries Open | lincs | ws20-21 winter-series | entries-open |
| TREC Lincolnshire LRAC Kenwick Winter Competition | 24/01/2021 | 05/12/2020 | 17/01/2021 | TREC Lincolnshire | Winter Series 2020-21 | | Entries Open | lincs | ws20-21 winter-series | entries-open |
| Wessex Cheltenham RDA PTV/MA Training | 02/01/2021 | 08/12/2020 | 31/12/2020 | Wessex TREC Club | PTV & MA Training | | Entries Open | wessex | ptv-ma-training training | entries-open |
| TSW Kingfisher Farm Winter Competition | 27/02/2021 | 15/12/2020 | 15/02/2021 | TREC Southwest | Winter Series 2020-21 | | Awaiting Schedule | tsw | ws20-21 winter-series | awaiting-schedule |
| T2015 TSW Fyne Court – On foot orienteering Training POSTPONED | 03/01/2021 | 19/11/2020 | 27/12/2020 | TREC Southwest | POR Training | | POSTPONED | tsw | por-training training | postponed |
