Beast Of The Beacons

APR
17
2027
Marked trail event in the Brecon Beacons offering 10, 20 and 40 mile routes with marshalled checkpoints, GPX routes and a mandatory kit list.
Sat 17 Apr 2027
40 miles 20 miles 10 miles

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Beast of the Beacons

The Beast of the Beacons is a marked trail running event in the Brecon Beacons National Park with routes of varied length that start and finish at Henderson Hall, Talybont on Usk / Gilestone Farm. The event follows trails through forests and mountains and includes rivers, reservoirs, rocky and soft forest paths, mud and exposed sections. GPX files are provided for the routes, with the 40 mile course run as a reversed second lap of the 20 mile route.

Distances

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

Elevation gain is listed for each distance and the published values include approximate totals for the 10, 20 and 40 mile options. Published cut off times allow extended completion windows for each route, including an extended cut off for the 40 mile option. The course is marked and supported by marshals.

Checkpoints are described as well stocked and able to cater for dietary requirements including vegan options; typical supplies include fruit, snacks, electrolytes, drinks and occasional homemade cake. The event is canicross friendly; dogs must be at least 12 months old, kept on the lead and remain the owner’s responsibility, and canicross entrants are not eligible for the standard trophies.

A mandatory kit list is enforced and checked at registration; required items include waterproof jacket and trousers, race vest or pack, capacity to carry 1 litre of fluid, map or downloaded GPX, mobile phone, hat and gloves, first aid items, foil blanket, reusable cup, head torch with spare batteries and appropriate footwear. Facilities at headquarters and nearby include toilets, catering vans, medical cover, local parking and nearby accommodation options. Prizes and age-category awards are published for finishing competitors. 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 new 15 mile trail event in September 2026 on the Rhymney Valley Ridgeway Walk, with 2,267 ft of ascent, mostly off-road terrain, one fully stocked checkpoint and organised entry support from Rudry to Parc Penalta.
Waun Fach on 6 September 2026: a 11.2 km, 610 m ascent fell race on a classic horseshoe route with marshals, limited to 50 entries; fee covers parking and light refreshments.
Timed lap event at Parc Taf Bargoed on 12 September 2026 offering distances from 5 km up to ultra with a 7 hour time limit.
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