Cymoedd Sir Fynwy

APR
18-19
2026
Read all about the Cymoedd Sir Fynwy on 18-19 Apr 2026 in Abergavenny.
18-19 Apr 2026
50 miles 30 miles 20 miles

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About the race

Cymoedd Sir Fynwy, staged by South Wales LDWA, is held at The Girl Guide Hall, Fairfield Car Park, Abergavenny (NP7 5TR). The event offers three distances—50 miles, 30 miles and a new 20-mile route—making it LDWA's toughest mountain challenge. The route winds through the Black Mountains and the World Heritage Site of the Forgotten Landscape above Blaenavon, with epic climbs up Deri, Loxidge Tump and Skirrid via Cwmyoy, Llanthony and Pandy.

After crossing into Blaenavon's landscape and Coity Mountain, finish along the Monmouthshire & Brecon Canal. A challenging, celebrated endurance race for experienced trekkers and runners, in challenging outdoor conditions. Visit the organization's website for the most recent information.

50 mi
50 Miles
30 mi
30 Miles
20 mi
20 Miles

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