OTT Ultra Marathon

Merthyr Tydfil, United Kingdom • 1 Nov 2025

The OTT Ultra Marathon is a challenging 30-mile trail race set in the scenic Brecon Beacons, South Wales. Starting in Merthyr Tydfil, the course follows the Taff Trail and riverside paths before ascending to Pen y Fan, the highest peak in South Wales at 886 meters. Runners then descend via Jacobs Ladder and traverse forestry tracks alongside reservoirs, offering stunning valley views. The route includes technical trails and five checkpoints with food and water, testing both novice and experienced ultra runners. With an elevation gain of about 1143 meters, the race demands a strong pace and mandatory safety kit, providing a rewarding and scenic ultra marathon experience. 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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