Ultra-Trail Snowdonia by Utmb
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Event overview
Ultra-Trail Snowdonia by UTMB takes place in Llanberis, North Wales from 15 to 17 May 2026. The event is part of the UTMB World Series. The 2025 edition included participants from more than 60 nationalities and over 2,800 runners across the four race distances.
Races and entry details
The event programme includes four races with published distances and elevation gains. Each race carries a UTMB running stones score. For 2026 the organiser lists registration status and entry prices (prices exclude an 8% booking fee). The listed races and details are: UTS 100M (15/05/2026) - Running Stones 4, distance 164 km, elevation gain 9500 m+, price £299; UTS 100K (16/05/2026) - Running Stones 3, distance 104 km, elevation gain 6500 m+, race marked full, price £239; UTS 50K (16/05/2026) - Running Stones 2, distance 56 km, elevation gain 3400 m+, race marked full, price £189; ERYRI 25K (17/05/2026) - Running Stones 1, distance 25 km, elevation gain 1400 m+, price £139.
Distances (summary) Visit the organization's website for the most recent information.
- UTS 100M - 164 km, 9500 m+ elevation
- UTS 100K - 104 km, 6500 m+ elevation
- UTS 50K - 56 km, 3400 m+ elevation
- ERYRI 25K - 25 km, 1400 m+ elevation
