Tenacious Ten Endurance Challenge

Talgarth, United Kingdom • 9 May 2026

Event overview

The Tenacious Ten Hour Endurance Challenge is a timed loop race on Saturday 9 May 2026 at Mynydd Troed, Pengenfford Common near Talgarth, Powys (LD3 0EY). The event runs for a strict 10-hour cut off and accepts solo, pair and team-of-four entries. Minimum age is 17. Entry fees listed are: Solo £55, Pair £100, Team of 4 £150.

Distances listed on the event pages vary:

  • 4.3 miles / 6.9 km per loop
  • 3.2 miles per loop
  • 2.6 miles / 4.18 km per loop

Course, rules and facilities

The route is a fully marked mountain loop that starts at the base of Mynydd Troed and includes steep climbs, technical and steep downhills, runnable sections and open common trails. Two clip stations are on course to verify laps. The event states that any lap not completed before the 10-hour horn will not be recorded. Team results count the collective number of laps; teams remain valid if a member drops out.

Facilities at headquarters include a refuel zone with food and drinks (including options for dietary requirements), toilets, camping field nearby, parking (charge and ballot noted) and a full medical team. A mandatory kit list is enforced and will be checked; required items include waterproofs, race vest, capacity for 2 L fluid, map or GPX, charged phone, first aid items, head torch and whistle, appropriate trail footwear and a reusable cup. Visit the organization's website for the most recent information.

Race information

3 mi
10 Hour 3.2-Mile Loop Race
Visit the organization's website for the most recent information.
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