Arc 12 is the 24.0km trail race at Arc of Attrition by UTMB 2026 (Coverack, United Kingdom). The race starts on January 25, 2026.
The course climbs 980m+. With 41m/km of climbing, this is a rolling, mostly runnable course. By gradient, 29% of the distance is uphill, 31% downhill and 39% flat. Surface: 47% trail, 35% smooth, and 18% road. Flat-equivalent effort: 29.6 FlatKM.
The course is runnable enough that trekking poles are not needed.
There is too little runnable descent to damage the quads: plan the race around climbing and fuelling.
On race day, start temperatures have historically ranged from 7°C to 11°C, with around 9°C at the highest point; the chance of precipitation is about 53%. Heavy rain of 10.0mm or more falls on about 10% of days around this date.
This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Arc 12.
Other distances of Arc of Attrition by UTMB 2026Arc 100 (160km)·Arc 50 (80.0km)·Arc 25 (40.0km)
Official websitearcofattrition.utmb.world
