Arc of Attrition by UTMB

JAN
22-24
2027
A January coastal ultra weekend in Perranporth, Cornwall offering 20 km to 100 mile races along the South West Coast Path.
22-24 Jan 2027
UTMB 20K/50K/100K/100M 173 kilometers 83 kilometers 49 kilometers 22 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Arc of Attrition by UTMB

Arc of Attrition by UTMB is a coastal ultra running event centred on Perranporth in Cornwall, UK, with courses on the South West Coast Path. The race weekend features multiple distances that use rugged cliffside trails and coastal terrain.

The event takes place each January and offers a range of race options:

  • Arc 100M: 173 km, 5507 m+ elevation
  • Arc 100K: 82.7 km, 2708 m+ elevation
  • Arc 50K: 49.4 km, 1458 m+ elevation
  • Arc 20K: 22.1 km, 744 m+ elevation

Courses include steep and uneven paths, sustained climbs and exposure to winter coastal weather. The races are organised within the UTMB World Series framework and carry Running Stones credit as listed for each distance. Since its launch in 2015 the event has expanded from a single 100 mile race with about 50 starters to a multi-distance weekend covering 20 km through 100 mile options. Visit the organization's website for the most recent information.

173 km
Arc 100m
83 km
Arc 100k
49 km
Arc 50k
22 km
Arc 20k

Events nearby

A coastal trail 10 km from Mount Hawke with technical terrain and a postrace 24 minute children's event; entries are limited and the organisers donate to the National Trust.
An outdoor obstacle course at Scorrier House Estate offering 10 km, 5 km and 2.5 km routes plus a dog friendly K9 day across mud, water and designed obstacles.
Multi terrain 10K around Rosemullion Head in Mawnan Smith on 25 October, organised by Falmouth Running Club as part of the Cornwall Multi Terrain Race Series.
A Halloween headtorch run around the private Scorrier House estate on 1 November 2026. Multiple distances including 2.5 km, 5 km, 10 km and canicross, medals for all and awards for top finishers; fancy dress encouraged and zombies will appear.
Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.