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Beast of the Beacons 20 & 40

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Saturday 31st July 2021

Entries Open
Thursday 20th August 2020
Entries Close
Sunday 25th July 2021 at 18:00
Entry Fees
20 Miles   £45.00   
40 Miles   £65.00   
Event Organiser - Ellen Wood

The Beast of the Beacons 20 & 40 are exciting challenges amongst some of the most spectacular, harsh but stimulating trails within the majestic Brecon Beacons National Park. Attracting runners from the elite to the beginner you will not be disappointed by this event. The event will be marked, however our pledge is to not use tape will stand. You with have added support from marshals. A generous cut off time of 8 hrs will ensure that you can tame the beast. The 40 mile route will be a reverse route of the 20 so if you happen to miss a view or two you will have another chance to enjoy the amazing Beacons..

Starting from Gilestone Farm - Talybont set deep in the heart of the National Park, you will follow the trail up to the reservoir before hesding over the dam and taking on the first challenging climb to Waun Rydd. Following the ridge you take in some outstanding views before descending down to Blaen y glyn. Heading further to then explore some fast and less techinal but beatiuful forest trails before crossing the magnificent and tranquil Pontsticill reservoir, taking in some incredible views before once again hitting the hills after crossing the Dolygaer Brecon Mountain Railway track. Heading back up you climb to take in the amazing views from Bryniau Glesision, look out on the right for the ruins of the Quary. Talybont reservoir will amazing you with incredible views of the valley whilst you descend through forest trails, technical but fast. You will be overwhelmed by the outstanding views that will follow you around this beautiful route. Red kites besides an abundance of wild life will add to the experience. The route offers everything that the trail runner love,. 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 only add to its charm and the challenge! 


  • Physios
  • Camping
  • Refreshments
  • Toilets
  • Bar
  • Parking £5 - see below
  • Full Medical Team
  • Safari Tents - book directly with Gilestone Farm
  • Moon & Back Coffee

What you get 

Bespoke medal, 


Prizes - 1st 2nd & 3rd Hand crafted wooden trophy, designed & hand carved in Wales - totally unique to us 1st Male & Female Vet over 50

Last runner inspirational Award

First Canine Trophy

Parking tickets will go into a ballot - winning ticket will have a free entry to our next event

Best picture advertising Limitless Trails on SM during this event will win a free entry to our next event 

Two refuel zones - full support from our amazing staff - refreshments and food - first aid 

Full gallery of pictures 

On line results 

Refreshents at the finish with a hot drink



  • MANDATORY KIT - Waterproof Jacket/trousers, Race vest, base layer, capacity to carry 1 litre of fluid, food, map or gpx file downloaded, telephone, hat & gloves, appropriate footwear (trail shoes) first aid kit, foil blanket, head torch & whistle. No participant will be allowed to participate without full kit. Full kit check at registration, spontaneous checks will be carried out on the event. Full kit list is on the website 
  • Please note that we are a cup free event - please remember to bring your reusable cup
  • Current covid 19 regulations will and must be adhered to.


Gilestone Farm
Talybont on Usk 
Nr Brecon


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