Arc 100 is a 160 km ultra trail of Arc of Attrition by UTMB 2026 in Coverack, United Kingdom. The race starts on January 22, 2026. The course climbs 3863 m+ and descends 3788 m−, between a low point of -1 m and a high point of 119 m. By gradient, 25% of the distance is uphill, 24% downhill and 50% flat. The longest climb runs 1.3 km at an average 3.6% grade (48 m of vertical). The longest descent runs 1.6 km at 3.0% (46 m of vertical). Surface: 52% trail, 21% smooth, 19% road, and 6% technical. Flat-equivalent effort: 219.2 FlatKM.
261 finishers completed the 2026 edition. Men's winner: Hugh Tibbs (Great Britain) in 19:10:09. Women's winner: Anne-Sofie Pollestad (Norway) in 22:28:24.
This page has the full results and splits, interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for Arc 100.
Other distances of Arc of Attrition by UTMB 2026Arc 50 (80.0 km)·Arc 25 (40.0 km)·Arc 12 (24.0 km)
Other editions of Arc 1002025
Official websitearcofattrition.utmb.world
