Ultra-Trail Snowdonia by Utmb
Llanberis, United Kingdom • 15-17 May 2026
Event overview
Ultra-Trail Snowdonia by UTMB is a UTMB World Series trail running event in Llanberis, North Wales. It is scheduled across 15–17 May 2026 and uses mountain and upland trails in the Snowdonia area. The event is described as featuring technical trails through the local landscape. The 2025 edition recorded more than 2,800 runners from over 60 nationalities.
Races and key details
The event includes four main race distances with listed elevation gain and race category points:
- 164 km , elevation gain 9,500 m, Running Stones 4 (UTS 100M)
- 104 km , elevation gain 6,500 m, Running Stones 3 (UTS 100K)
- 56 km , elevation gain 3,400 m, Running Stones 2 (UTS 50K)
- 25 km , elevation gain 1,400 m, Running Stones 1 (ERYRI 25K)
Race entries show prices (exclusive of an 8% booking fee): £299 for the 164 km, £239 for the 104 km, £189 for the 56 km, and £139 for the 25 km. The 100K and 50K races are listed as full. The event operates as an in-person (offline) competition within the UTMB World Series calendar. Visit the organization's website for the most recent information.