OTT Ultra Marathon

Merthyr Tydfil, United Kingdom • 1 Nov 2025

The OTT Ultra Marathon is a challenging 30-mile trail race held in the scenic Brecon Beacons, South Wales, starting from Merthyr Tydfil. The course features technical trails, including the Taff Trail and paths alongside the River Taff, leading to the Beacons Reservoir. A highlight is the climb to Pen y Fan, the highest peak in South Wales at 886 meters, followed by a descent via Jacobs Ladder and a route through forest tracks with stunning valley views. The race includes five checkpoints with aid stations and has a 6-hour cutoff at 20 miles. It suits both newcomers to ultra trail running and experienced athletes. Visit the organization's website for the most recent information.

Race information

30 mi
1143 m+
30 Miles
Visit the organization's website for the most recent information.
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