Beast Of The Beacons

APR
18
2026
Trail running from Gilestone Farm through the Brecon Beacons with marked 10, 20 and 40 mile routes, well stocked checkpoints and mandatory kit checks; the 40 mile follows the 20 mile route in reverse.
Sat 18 Apr 2026
40 miles 20 miles 10 miles

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Beast of the Beacons - Gilestone Farm, Brecon Beacons National Park

Beast of the Beacons is a trail running event based at Gilestone Farm, Talybont on Usk, within the Brecon Beacons National Park. The event offers multiple route options over natural terrain and is a marked course with GPX downloads available.

Distances:

  • 10 Miles / 16 KM
  • 20 Miles / 32.5 KM
  • 40 Miles / 65 KM

The 40 mile route follows the 20 mile course in reverse. Routes pass reservoirs, ridges, forests, rivers and both technical and fast forest trails. Wildlife, including red kites, is frequently observed along the way. Snow can sometimes be present on the route.

Checkpoints are described as well stocked and cater for dietary requirements including vegan options. Typical checkpoint food includes nuts, bananas, biscuits, crisps, electrolytes, coke, squash, water and occasional homemade cake.

Cut off times are set to allow completion within the day - the 10 and 20 mile routes have an 8 hour cut off and the 40 mile route has a 16 hour cut off. The event is canicross friendly; dogs must be at least 12 months old, fit to run, and kept on the lead with owners responsible for them. Mandatory kit is required and will be checked; the list includes waterproofs, carrying capacity for fluids, map or GPX, first aid items, head torch and whistle, and appropriate footwear.

Facilities at headquarters include camping, toilets, on-site catering and a full medical and physiotherapy team. Online results, event photos and prizes are provided. Visit the organization's website for the most recent information.

40 mi
40 Mile Ultra Challenge
20 mi
20 Mile Trail Running Challenge
10 mi
10 Mile Trail Running Challenge