Cornwall's brutal 100-mile winter coastal ultra
The Arc 100M is a 173 km point-to-point coastal ultra along Cornwall's South West Coast Path, from the fishing village of Coverack on the Lizard Peninsula to the finish at Perranporth Airfield. The route rounds the Lizard past Kynance Cove, passes Land's End, Cape Cornwall, Botallack and Zennor Head, then crosses Hayle and the Dunes of Doom and rounds Godrevy Head on the way north. It climbs 5,507 metres with a 37-hour time limit, and large sections are run in darkness. Runners must be self-sufficient for long stretches between aid stations; one support crew member may help at designated aid stations, and a drop bag is carried to Land's End. The organisers recommend a UTMB Index of at least 380. It is widely regarded as one of the UK's toughest 100-mile races.
Experienced ultrarunners
Porthtowan, England, United KingdomJanuary 22, 2027
Arc of Attrition Arc 100M is a point-to-point trail race in Porthtowan, England, United Kingdom, held on January 22, 2027. The course covers 173 km, climbs 5,507 m, and has a 37h cutoff.
| Location | km | Elevation | Cutoff | Crew | Drop bags |
|---|---|---|---|---|---|
Covarck Start | 0.0 | 25 m | — | ||
AS01 Lizar Aid Station | 17.1 | 31 m | — | ||
AS02 Porth Aid Station | 40.1 | 7 m | — | ||
AS03 Penza Aid Station | 64.3 | 6 m | — | ||
AS04 Minac Aid Station | 82.0 | 59 m | — | ||
AS05 Lands Aid Station | 89.5 | 65 m | — | ||
AS06 Pende Aid Station | 105.6 | 72 m | — | ||
AS07 Lelan Aid Station | 133.7 | 5 m | — | ||
AS08 Godre Aid Station | 144.1 | 6 m | — | ||
AS09 Portr Aid Station | 155.9 | 6 m | — | ||
Finish Finish | 171.6 | 101 m | 37h2:00 AM +2 |
Aid station details for this race are still being filled in. Cutoffs and access rules come from the race’s own published information and can change — check the official race details before planning around them.
Sign in for race-day weather at every station, points of interest, segment-by-segment analysis, pacing, and to save this race to your calendar.
No camping at the event venue. From 2027 the event is based at Perranporth Airfield (Higher Trevellas St, Trevellas, St Agnes TR5 0XS), and overnight stays, including sleeping in vehicles or tents, are not permitted in the event car park. Book a local campsite, B&B or hostel early; Nirvana is the official travel and accommodation partner.
January temperatures in Cornwall can drop below freezing overnight, particularly on exposed coastal headlands. Cold weather kit is mandatory for 2026.
Cornwall in January is notorious for rapidly changing conditions — strong Atlantic winds, heavy rain, and sudden temperature drops are common across the exposed coast path.
Coastal exposure means significant wind on open headlands, particularly around Land's End, Cape Cornwall, and Zennor Head.
No required gear specified
No recommended gear specified
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