Tenacious Ten Endurance Challenge

The Tenacious Ten Endurance Challenge is a demanding 10-hour loop race held at Mynydd Troed on Pengenfford Common near Talgarth in the Black Mountains of Wales. Participants tackle a strenuous 3.2-mile (5.1 km) technical loop featuring a harsh climb to the summit with 1,036 ft (316 m) ascent and steep, technical descents, offering stunning 360-degree views of the Black Mountains and Brecon Beacons. Runners can choose their loop direction after the first lap, with a strict 10-hour cutoff.

The event welcomes solo runners, pairs, and teams of four, providing a fully marked course, refuel zone with varied nutrition, camping facilities, and medical support. It emphasizes endurance, determination, and safety with mandatory kit requirements. Visit the organization's website for the most recent information.