Tenacious Ten Endurance Challenge

Talgarth, United Kingdom • 9 May 2026

Event overview

The Tenacious Ten Hour Endurance Challenge takes place on Saturday 9 May 2026 at Mynydd Troed, Pengenfford Common, near Talgarth, Powys (LD3 0EY). The event is a lap-based endurance challenge with a strict 10 hour cut off; any lap not completed before the final horn will not be recorded. Entries are open to solo runners, pairs and teams of four. Minimum age is 17. Entry fees are listed as: solo £55, pair £100, team of 4 £150.

Distances listed for the loop include:

  • 4.3 miles / 6.9 km
  • 2.6 miles / 4.18 km
  • 3.2 miles (also described in some places as around 3 miles)

Course, rules and facilities

The route is a marked loop that begins at the base of Mynydd Troed and includes a sustained climb to the summit, runnable sections, and technical steep downhills. The first lap is run clockwise; after that participants may choose direction. Two clip stations are on course to confirm laps. Team entries are scored by total laps completed; teams remain valid if a member drops out. Medical staff may stop a runner; continuing against medical advice is at the runner’s own risk.

A refuel zone and drop-bag area are based at the start/finish. Facilities include camping, refreshments, toilets, parking (paid and partly by ballot), and a full medical team. A mandatory kit list is enforced and kit checks will take place. GPX files are provided. 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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