Tenacious Ten Ultra

About this event

The Tenacious Ten Ultra takes runners up Pen Cerrig-calch (701m) repeatedly over 10 hours, with the challenge being to complete as many 3.2-mile loops as possible. Each loop starts with a steep climb from the mountain's base, follows technical paths to the summit, then drops rapidly back down. Runners tackle this either solo, in pairs, or as teams of four, with the current solo record standing at 10 loops. The Welsh mountain setting offers sweeping views toward Pen Y Fan, though competitors will be focused on managing their energy across multiple ascents. On-site physiotherapists provide support throughout, and team members can rest between loops. This format rewards pacing strategy as much as raw endurance—knowing when to push and when to recover makes all the difference over those 10 hours.

Distances