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.
- 21/03/2026 SIAB British Schools U15 & U17 Cross Country International @ Vaynol Park, Pentir, Gwynedd
- 21/03/2026 Spring Equinox 6 Mile Trail Run @ Wentwood Forest, Nr Newport
- 21/03/2026 British Masters Cross Country Championships @ Faenol Estate, North Wales
- 21/03/2026 Primary School Cross Country Races Prior to SIAB Schools International @ Faenol Estate
- 22/03/2026 Merthyr Half Marathon SOLD OUT
- 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
- 29/03/2026 San Domenico 10 & 20 Mile Road Races @ Merthyr Tydfil
- 05/04/2026 Teifi 10 Mile Road Race @ Lampeter
- 12/04/2026 Kymin 7 Mile Multi Terrain Race @ Monmouth
- 12/04/2026 Penallta Pony Run 5 Mile Multi Terrain @ Hengoed
- 19/04/2026 Newport 10km Half Marathon & Marathon
- 19/04/2026 Trawsfynydd Multi Terrain 8 Miler
- 26/04/2026 London Marathon
- 03/05/2026 The British Inter-Counties Senior Mountain Race and Junior Hill & Fell Championships @ Sedbergh Cumbria
- 10/05/2026 Caerphilly 10km
- 13/05/2026 Swansea Bay 5km Series Race 1 of 3
- 17/05/2026 Barry Island 10km
- 17/05/2026 Sirhowy Loop 6.66 mile multi terrain race @ Caerphilly
- 17/05/2026 Sirhowy Challenge 10-mile multi-terrain race with 1500ft climb to Machen Trig Point @ Caerphilly
- 20/05/2026 SSAFA Cardiff 5K Road Race Series 1 of 3