Beast of the Beacons

APR
17
2027
Trail running in the Brecon Beacons with marked 10, 20 and 40 mile routes, staffed checkpoints, GPX files and mandatory kit checks.
Sat 17 Apr 2027
40 miles 20 miles 10 miles

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About the race

The Beast of the Beacons is a trail running event on 17 April 2027 in the Brecon Beacons National Park, starting and finishing at Henderson Hall, Talybont on Usk. The event offers three marked distances:

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

Routes run across forest tracks, mountain trails, rivers and reservoir edges with varied surfaces including rocky paths, mud and steep climbs. Elevation gain is listed in the event information as approximately 2026 ft for the 10 mile route, 3884 ft for the 20 mile route and 7768 ft for the 40 mile route. The 40 mile course follows a reversed second lap of the 20 mile route.

Checkpoints are staffed and described as well stocked, offering nuts, fruit, biscuits, crisps, electrolytes, drinks and options for different diets including vegan. The event is marked and supported by marshals and a full medical team. Cut off times are set at eight hours for the 10 and 20 mile routes and 16 hours for the 40 mile route.

The event is canicross friendly: dogs must be at least 12 months old, fit to run, kept on a lead and remain the owner’s responsibility; canicross entries are not eligible for the main trophies. GPX files are provided for the routes. A mandatory kit list is enforced and includes waterproofs, a race pack, carrying capacity for at least 1 litre of fluid, emergency food, map or downloaded GPX, charged phone, first aid items, foil blanket, reusable cup, head torch and whistle. 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

Events nearby

A 7 hour Time Challenge at Dare Valley Country Park with flexible distances from 3 km to ultramarathon options. Finishers receive a themed medal, distance pins and refreshments including doughnuts and ice cream.
A fell race on 3 October 2026 with a 3.2 km route and 305 m climb near Storey Arms, included in the South Wales Series; entry on the day £2.
A ridge fell race in the Black Mountains, 11.7 km with 492 m ascent, run under WFRA rules for runners aged 16 and over.
A seven hour Time Challenge at Dare Valley Country Park offering distances from 3km to 50km, themed finisher medals and distance pins, on course aid with vegan options, and basic venue facilities including toilets and free parking.
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