UTS 100M is a 164 km ultra trail of Ultra-Trail Snowdonia by UTMB 2025 in Llanberis, United Kingdom. The race starts on May 15, 2025. The course climbs 9275 m+ and descends 9274 m−, between a low point of 31 m and a high point of 1050 m. By gradient, 37% of the distance is uphill, 39% downhill and 24% flat. The longest climb runs 6.3 km at an average 13.9% grade (867 m of vertical). The longest descent runs 6.5 km at 13.8% (899 m of vertical). Surface: 48% trail, 23% smooth, 17% technical, and 6% road. Flat-equivalent effort: 286.4 FlatKM.
146 finishers completed the 2025 edition. Men's winner: Ethan Peters (Canada) in 23:59:20. Women's winner: Paulina Krawczak (Poland) in 28:13:11.
This page has the full results and splits, interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for UTS 100M.
Other distances of Ultra-Trail Snowdonia by UTMB 2025UTS 100K (106 km)·UTS 50K (56.0 km)
Other editions of UTS 100M2026
Official websitesnowdonia.utmb.world
