Sat 18 Apr 2026 Brecon, Powys

Beast of the Beacons 10, 20 and 40 Mile Trail Running Challenge | 20 Mile

The Beast of the Beacons 10, 20 & 40 is an exciting challenge set amongst some of the most spectacular, harsh but stimulating trails within the majestic Brecon Beacons National Park.

Sign up for £60

Enter now
  • Sat 18 Apr 2026
Henderson Hall, Brecon
20 Mile

09:30

Age 18 & over

£60

  • 20 miles trail running

Event overview

Attracting runners from the elite to the beginner you will not be disappointed by this event. The event will be marked with the added support of marshals. A generous cut off time of 5 hours for the 10 mile, 8 hours for the 20 mile route and 16 hours for the 40 mile route will ensure that you can tame the beast. The 40 Mile course is a second lap of the route, reversed so you can catch any scenes you may have missed the first time around! Starting from Henderson Hall - Talybont on Usk, Brecon - set deep in the heart of the National Park, you will follow trails exploring forests, mountains, rivers, reservoirs and mud! You will be overwhelmed by the outstanding views that will follow you around this beautiful route. Red kites will be your companions beside an abundance of wildlife. The route offers everything that the trail runner expects. Harsh climbs, rocky paths to soft forest trails, mud, rivers and maybe the odd surprise. It's not unheard of to still encounter snow on this event, which will add to the charm and challenge! This is a canicross friendly event. Dogs must be at least 12 months of age, fit to run and kept on the lead at all times. Owners take full responsibility for their dogs both at headquarters and around the route. Unfortunately, due to the added benefit of having a bit of extra ‘pull’ from your four-legged friend, we cannot allocate trophies to any canicross participants.

This event is part of Beast of the Beacons 10, 20 and 40 Mile Trail Running Challenge.

Event details

  • Average fitness
  • Beginner-friendly
  • Dogs allowed at venue
  • Event village

Route

  • Check points
  • Cut off time
  • Distance markers
  • First aid
  • Marshals

Location

  • Cafe
  • Camping
  • Paid parking
  • Toilets

What's included

  • Cake
  • Camping
  • Medal
  • Snacks
  • Trophy

How to enter

  • Age 18 & over
  • Entries open
  • Enter online
Enter now

Other races at event

  • Sat 18 Apr
  • #1 of 3
Henderson Hall, Brecon
10 Mile

10:30

Age 16 & over

£48

  • 10 miles trail running
  • Sat 18 Apr
  • #3 of 3
Henderson Hall, Brecon
40 Mile

08:00

Age 18 & over

£80

  • 40 miles trail running
4 steps to wellbeing
Sleep well

A good night's sleep is an essential foundation for a healthy lifestyle, effective training and weight control.

Train slow

Low-intensity training is easier for you, reduces the risk of injury and helps builds an efficient aerobic system.

Eat natural

Cut out sugar & junk food, reduce carbs, eat natural foods and train your body to burn fat for fuel.

Get outdoors

Fresh air, natural light and reconnecting with nature all help to improve mental and physical wellbeing.