Arc 100 is the 160km ultra trail at Arc of Attrition by UTMB 2026 (Coverack, United Kingdom). The race starts on January 22, 2026.
By gradient, 25% of the distance is uphill, 24% downhill and 50% flat. Surface: 52% trail, 21% smooth, 19% road, and 6% technical. Flat-equivalent effort: 219.2 FlatKM.
The course is runnable enough that trekking poles are not needed.
Quad damage risk is moderate (index 35 of 100), with 51% of the load in the first half: 0 descents deserve a plan and a couple of downhill sessions before race day.
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, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Arc 100.
Other distances of Arc of Attrition by UTMB 2026Arc 50 (80.0km)·Arc 25 (40.0km)·Arc 12 (24.0km)
Other editions of Arc 1002025
Official websitearcofattrition.utmb.world
