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Ultra marathons in Gwynedd

There are 3 upcoming ultra races in Gwynedd listed. Next up: Eryri by UTMB (Saturday, 15 May 2027), Welsh 3 Peaks Race 2027 (Monday, 20 September 2027), MTC Cerridwen (Wednesday, 5 July 2028).

Upcoming races only, soonest first. Confirm dates and entry details with the organiser.

May152027Trail
Eryri by UTMB
Llanberis
The UTMB World Series event in Eryri (Snowdonia), based in Llanberis.
UltraOther distance
Price not confirmed
Details
Sept202027Terrain not confirmed
Welsh 3 Peaks Race 2027
Llanberis · Llanderis, Y Ganolfan. LL554UR
A continuous 295km mountain ultra from Llanberis across Yr Wyddfa, Cadair Idris and Pen y Fan, finishing at Storey Arms. The published route has over 13,000m of ascent. Solo entry is £415; check experience, kit and support requirements before entering.

Plan your pace

Work out your target ultra time and pace.

Pace calculator