In case of any competition changes please keep checking back and the links to organisers websites. Only UK Athletics / Welsh Athletics licenced events are listed.
- 05/03/2021 Welsh Athletics 2 Miles Virtual until 8th March
- 12/03/2021 Welsh Athletics 3 Miles Virtual until 15th March
- 19/03/2021 Welsh Athletics Junior 5km & Senior 10km Virtual until 22nd March
- 02/05/2021 Cardiff 5km Incorporating the Welsh Championships
- 09/05/2021 Epic Trail 10km @ Swansea
- 16/05/2021 Caerphilly 10km
- 23/05/2021 Cardiff Bay 10km Incorporating The Welsh Championships
- 13/06/2021 Swansea Half Marathon
- 26/06/2021 Afan Forest 10km Half Marathon & Marathon Trail Races @ Port Talbot
- 04/07/2021 Porthcawl 10km
- 11/07/2021 Ammanford 10km Incorporating the West Wales Championships
- 11/07/2021 Snowdonia 10km, Half, Full & Ultra Trail Marathons @ Llanberis
- 25/07/2021 Tenby 10km
- 25/07/2021 Fforest Fawr 10km Trail Race @ Caerphilly
- 01/08/2021 Barry Island 10km
- 05/09/2021 Cardiff 10km
- 05/09/2021 Bath Half Marathon
- 12/09/2021 Great North Run Half Marathon @ Newcastle
- 19/09/2021 Swansea Bay 10km
- 19/09/2021 Pumsaint Trail Half Marathon