Arc 25 is the 40.0km trail race at Arc of Attrition by UTMB 2026 (Coverack, United Kingdom). The race starts on January 22, 2026.
By gradient, 17% of the distance is uphill, 28% downhill and 55% flat. Surface: 42% trail, 27% road, 20% smooth, and 10% technical. Flat-equivalent effort: 47.3 FlatKM.
The course is runnable enough that trekking poles are not needed.
Quad damage risk is low (index 9 of 100): a few descents worth noting, none of them decisive.
836 finishers completed the 2026 edition. Men's winner: Robbie Simpson (Great Britain) in 2:45:51. Women's winner: Naomi Lang (Great Britain) in 3:09:16.
This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Arc 25.
Other distances of Arc of Attrition by UTMB 2026Arc 100 (160km)·Arc 50 (80.0km)·Arc 12 (24.0km)
Other editions of Arc 252025
Official websitearcofattrition.utmb.world
