Arc 100 is the 160km ultra trail at Arc of Attrition by UTMB 2025 (Coverack, United Kingdom). The race starts on January 24, 2025.
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: 229.1 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.
252 finishers completed the 2025 edition. Men's winner: Lewis Ryan (Great Britain) in 19:22:35. Women's winner: Noor Van Der Veen (Netherlands) in 22:30:44.
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 2025Arc 50 (80.0km)·Arc 25 (40.0km)
Other editions of Arc 1002026
Official websitearcofattrition.utmb.world
