Ultra-Trail Snowdonia by Utmb
Llanberis, United Kingdom • 15 May 2026
Ultra-Trail Snowdonia by UTMB
Ultra-Trail Snowdonia by UTMB is a series of trail races held in Llanberis, North Wales, and forms part of the UTMB World Series. The event takes place from 15 to 17 May 2026 and features mountain courses with substantial elevation gain.
Races and core figures include:
- UTS 100M: 163 km, 9200 m+ elevation, Running Stones 4
- UTS 100K: 100 km, 4400 m+ elevation, Running Stones 3
- UTS 80K: 78 km, 2500 m+ elevation, Running Stones 3
- UTS 50K: 56 km, 3400 m+ elevation, Running Stones 2
- ERYRI 25K: 25 km, 1400 m+ elevation, Running Stones 1
Several races are listed as full for the 2026 edition while others show registrations open. The event awards Running Stones across its races as part of its competition structure. The 2025 edition involved more than 60 nationalities and over 2,800 runners across the event races. Visit the organization's website for the most recent information.