| EATG Thunderley Parsonage – POR Competition – NEW VENUE | 23/05/2021 | 23/04/2021 | 17/05/2021 | East Anglia TREC Group | POR Only Competition | 1, 2, 2a | Entries Open | east-anglia | por-only summer-series | entries-open |
| Gower Spring TREC Summer 2021 Competition | 23/05/2021 | 31/03/2021 | 16/05/2021 | Red Kite TREC Group | Summer Series 2021 | 1, 2, 2a | Entries Full | red-kite | ss21 summer-series | entries-full |
| Wernham Farm – Summer 2021 Competition | 28/05/2021 | 01/04/2021 | 16/05/2021 | Wessex TREC Club | Summer Series 2021 | 1, 2, 2a, 3 | Entries Open | wessex | ss21 summer-series | entries-open |
| Harwood Dale TREC, North Yorkshire, Summer 2021 Competition – NEW DATE | 23/07/2021 | 01/05/2021 | 01/07/2021 | White Horse TREC Group | Summer Series 2021 | 1, 2, 2a, 3, 4 | Entries Open | whtg | ss21 summer-series | entries-open |
| Barnetby TREC -Summer 2021 Competition | 12/06/2021 | 05/04/2021 | 28/05/2021 | TREC Lincolnshire | Summer Series 2021 | 1, 2, 2a | Entries Full | lincs | ss21 summer-series | entries-full |
| Oasby TREC – Summer 2021 Competition | 17/07/2021 | 15/05/2021 | 02/07/2021 | TREC Lincolnshire | Summer Series 2021 | 1, 2, 2a | Awaiting Schedule | lincs | ss21 summer-series | awaiting-schedule |
| Quantock TREC – POSTPONED | 03/07/2021 | 01/05/2021 | 04/06/2021 | TREC Southwest | Summer Series 2021 | 2, 2a, 3 | POSTPONED | tsw | ss21 summer-series | postponed |
| Scottish Championships – Fife – Summer 2021 Competition (New Date) | 20/08/2021 | 30/06/2021 | 06/08/2021 | TREC Scotland | Summer Series 2021 | 1, 2, 2a, 3, 4 | Awaiting Schedule | trec-scotland | ss21 summer-series | awaiting-schedule |
| 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 – POSTPONED | 18/09/2021 | 01/07/2021 | 28/08/2021 | TRAC (TREC Riders Association Cymru) | Summer Series 2021 | 1 | POSTPONED | trac | ss21 summer-series | postponed |
| Tugford TREC, Summer 2021 Competition – Welsh Championships | 11/09/2021 | 01/07/2021 | 28/08/2021 | TRAC (TREC Riders Association Cymru) | Summer Series 2021 | 1, 2, 2a, 3, 4 | Awaiting Schedule | trac | ss21 summer-series | awaiting-schedule |
| Park Farm Grass Route Series 1 | 20/06/2021 | 20/05/2021 | 10/06/2021 | Central TREC Group | Summer Series 2021 | 1 | Awaiting Schedule | central | ss21 summer-series | awaiting-schedule |
| Park Farm Grass Route Series 2 – NEW DATE | 10/07/2021 | 10/06/2021 | 26/06/2021 | Central TREC Group | Summer Series 2021 | 1 | Awaiting Schedule | central | ss21 summer-series | awaiting-schedule |
| CTG Park Farm Summer Competition | 27/08/2021 | 01/07/2021 | 20/08/2021 | Central TREC Group, Keysoe & Three Shires TREC Club | Summer Series 2021 | 1, 2, 2a, 3, 4 | Awaiting Schedule | central keysoe | ss21 summer-series | awaiting-schedule |
| EATG Home Farm Riddlesworth Summer Series Competition | 17/09/2021 | 16/08/2021 | 10/09/2021 | East Anglia TREC Group | Summer Series 2021 | 1, 2, 2a | Awaiting Schedule | east-anglia | ss21 summer-series | awaiting-schedule |
| IOM Eairy Mount Summer Series Competition | 03/07/2021 | 03/06/2021 | 26/06/2021 | TREC Isle of Man | Summer Series, Summer Series 2021 | 1, 2 | Awaiting Schedule | iom | summer-series ss21 | awaiting-schedule |
| TREC GB National Championships | 06/08/2021 | 06/07/2021 | 20/07/2021 | | Summer Series 2021 | 2, 2a, 3, 4 | Awaiting Schedule | | ss21 summer-series | awaiting-schedule |
| WHTG XC Training for TREC | 16/05/2021 | 16/03/2021 | 10/05/2021 | White Horse TREC Group | PTV & MA Training | | Entries Open | whtg | ptv-ma-training training | entries-open |
| TRAC Frodsham Junior TREC Train and Compete | 09/07/2021 | 01/05/2021 | 16/06/2021 | TRAC (TREC Riders Association Cymru) | TREC Camp | | Entries Open | trac | camp training | entries-open |
| SET Brightling Park Summer Trec | 20/06/2021 | 01/05/2021 | 04/06/2021 | South East TREC Group | Summer Series 2021 | 1, 2 | Entries Open | setg | ss21 summer-series | entries-open |
| BTG Greenlands EC TREC Training Camp | 20/08/2021 | 20/07/2021 | 15/08/2021 | Bowland TREC Group | Training, TREC Camp | | Awaiting Schedule | bowland | training camp | awaiting-schedule |
| Wessex – Ablington POR Ride | 15/05/2021 | 12/04/2021 | 08/05/2021 | Wessex TREC Club | POR Training, Training | | Entries Open | wessex | por-training training | entries-open |
| WESSEX – Lyford Stud Summer PTV & MA Competition | 15/08/2021 | 04/07/2021 | 01/08/2021 | Wessex TREC Club | PTV & MA Only Competition | 1, 2 | Awaiting Schedule | wessex | ptv-ma summer-series | awaiting-schedule |
| Sands Farm Summer Series TREC Competition | 05/09/2021 | 17/07/2021 | 21/08/2021 | Wessex TREC Club | Summer Series 2021 | 1 | Awaiting Schedule | wessex | ss21 summer-series | awaiting-schedule |
| NEST Mosswood TREC Fixed Obstacle Training | 15/05/2021 | 19/04/2021 | 07/05/2021 | North East Scotland TREC | PTV & MA Training | | Entries Open | nest | ptv-ma-training training | entries-open |
| NEST Mosswood Stables Summer Arena MA/PTV Competition | 29/05/2021 | 19/04/2021 | 21/05/2021 | North East Scotland TREC | PTV & MA Only Competition | | Awaiting Schedule | nest | ptv-ma summer-series | awaiting-schedule |
| BTG Bank Farm PTV Training | 23/05/2021 | 23/04/2021 | 16/05/2021 | Bowland TREC Group | PTV & MA Training | | Entries Open | bowland | ptv-ma-training training | entries-open |
| SET Stonelink Farm Judges Training | 31/05/2021 | 27/04/2021 | 21/05/2021 | South East TREC Group | Judge Training | | Entries Open | setg | judge training | entries-open |
| TSW Poltimore Park – POR/PTV/MA Training | 06/06/2021 | 01/04/2021 | 24/05/2021 | TREC Southwest | POR, PTV & MA Training | | Entries Open | tsw | por-ptv-ma-training training | entries-open |
| SETG Stonelink Farm One Day Training | 25/05/2021 | 19/04/2021 | 24/05/2021 | South East TREC Group | POR, PTV & MA Training | | Entries Open | setg | por-ptv-ma-training training | entries-open |
| SETG Stonelink Farm One Day Training | 11/05/2021 | 19/04/2021 | 10/05/2021 | South East TREC Group | POR, PTV & MA Training | | Entries Open | setg | por-ptv-ma-training training | entries-open |
| Wessex Lawfield Judges Training | 17/07/2021 | 01/05/2021 | 04/07/2021 | Wessex TREC Club | Judge Training | | Entries Open | wessex | judge training | entries-open |
| NEST Mosswood Arena PTV/MA TREC Competition | 04/07/2021 | 06/05/2021 | 15/06/2021 | North East Scotland TREC | PTV & MA Only Competition | 4 | Entries Open | nest | ptv-ma summer-series | entries-open |
| NEST Mosswood TREC Fixed Obstacle Training | 12/06/2021 | 06/05/2021 | 30/05/2021 | North East Scotland TREC | PTV & MA Training | | Entries Open | nest | ptv-ma-training training | entries-open |
| BTG Rawlinshaw Farm POR/PTV/MA Training | 19/06/2021 | 19/05/2021 | 13/06/2021 | Bowland TREC Group | POR, PTV & MA Training | | Awaiting Schedule | bowland | por-ptv-ma-training training | awaiting-schedule |
| SoS Hyndshawland Farm TREC 10/10 Competition | 27/06/2021 | 05/05/2021 | 18/05/2021 | South of Scotland TREC | 10:10 | | Entries Open | sos | 1010 summer-series | entries-open |
| SoS Hyndshawland Farm TREC Training Camp | 25/06/2021 | 05/05/2021 | 18/05/2021 | South of Scotland TREC | TREC Camp | | Entries Open | sos | camp training | entries-open |
