Distance
20 KM
Elevation Gain
500 M+
Start Date
Sunday 25th January 2026
Race Start
Godrevy - 07:00
Max Allowed Race Time
04 Hours
Introducing the Arc 12!
Join us for the newest race at the Arc of Attrition - Arc 12 - your coastal trail half-marathon.
Brought to you by the team behind the legendary Arc of Attrition by UTMB, this race may be short, but the experience will last long!
New in the 20K category, this race is a great introduction to the coastal trails in Cornwall and perfect for runners looking to begin their Arc experience. Starting from near Godrevy, you'll sample the morning sunrise and stunning scenery as you head for the finish in Porthtowan.
Runners will complete an undulating 20km course along the South West Coast Path, a National Trail and one of England's longest marked footpaths.
The Arc 12 race starts near Godrevy, navigates Godrevy Point and various coves towards Portreath, the location of the aid station. After refuelling runners will take on the final three climbs before arriving under the finish arch in Porthtowan.
For a full list of the mandatory kit (clothing and equipment) which you must have with you at all times during your race, please visit the mandatory kit webpage.
There is one aid stations available at Portreath, approximately half-way along the route.
This aid station will provide basic drink options to runners, warm shelter and toilet facilities. A selection of other snacks including cold drinks, water, cola and Näak Energy products will be available.
There will be toilet facilities (including female toilets and toilets with period products), seating and rest areas.
There is no personal assistance ('support crew') allowed during the Arc 12 competition. Therefore, only participants will be allowed access to aid stations.
The Arc of Attrition by UTMB is a semi-autonomous / self-sufficient event with aid stations and medical cover at strategic locations on the course.
There will be no personal assistance (also known as 'support crew') allowed during the Arc 12 competition. No personal assistance is allowed at any point along the route or during the race.
However, due to the extent of the course, the likelihood of fatigue and the time of year, we strongly advise you to have someone to meet you at the finish who can drive you home after the event.
The race follows an existing waymarked route, and there will be some course waymarking. We would however recommend runners have previous trail running experience and are comfortable with coastal path conditions including climbs and descents with multiple steps.
The route follows the undulating cliff path and cliff edges, and the terrain can be difficult, steep and arduous in places.
Due to the early race start, the first part of the route may be undertaken in darkness. Therefore, we recommend runners have experience of running in the dark, or before the early morning sunrise.