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.
- 07/03/2026 England Athletics Indoor U15 & U17 Age Group Combined Events & Junior Para Championships @ TBC Until 8th March
- 08/03/2026 Llanelli 10km, Half Marathon & Full Marathon
- 14/03/2026 Nant Yr Arian Silver Trail Races 10km & Half Marathon
- 15/03/2026 West Glamorgan Cross Country League Round 5 of 5 @ Gnoll Country Park
- 20/03/2026 World Indoor Athletics Championships @ Kujawy Pomorze, Poland Until 22nd March
- 21/03/2026 SIAB British Schools U15 & U17 Cross Country International @ Vaynol Park, Pentir, Gwynedd
- 22/03/2026 Merthyr Half Marathon
- 27/03/2026 European Masters Indoor Championships @ Torun, Poland Until 2nd April
- 28/03/2026 Welsh Seniors 4 Stage & Masters 3 Stage Road Relay Championships @ Parc Bryn Bach incorporating the trials for the London Mini Marathon U14, U16 & U18
- 18/04/2026 British Universities 10,000m Championships @ Loughborough
- 19/04/2026 Newport 10km Half Marathon & Marathon
- 19/04/2026 Trawsfynydd Multi Terrain 8 Miler
- 26/04/2026 London Marathon
- 10/05/2026 Caerphilly 10km
- 17/05/2026 Barry Island 10km
- 07/06/2026 Swansea Half Marathon
- 03/07/2026 England Athletics U20 & Senior Championships, U20 & Senior Combined Events Championships & Senior Para Championships @ TBC Until 5th July
- 05/07/2026 Porthcawl 10km
- 12/07/2026 Mic Morris Torfaen 10km
- 16/07/2026 European Athletics U18 Championships @ Rieti, Italy Until 19th July