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OTT Marathon
TrailUnited KingdomWales

OTT Marathon2027

15.05.2027Merthyr Tydfil (United Kingdom)
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2 courses · 16.1–41.8 km

2 courses

  1. 16.1km

    399 m D-

    10 mi
    No index
    GPX

  2. 41.8km

    1’541 m D-

    26 mi
    No index
    GPX

Course analysis

41.8 km1’493 m D+

57effort kmⓘ41.8 km on the map · feels like 57 km
D+
1’493 m
D−
1’541 m
Max alt.
881 m
Steepest
20%

Segments

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Elevation profile: 26 mi

193 m — 881 m

Feels like these

Race plan

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Pacing, aid stations and fueling timed to your effort on OTT Marathon, in one roadbook.

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The race

A true mountain challenge across the iconic Pen y Fan range, featuring steep climbs, technical trails, and wild weather.

Where to stay

Find a place to stay near Merthyr Tydfil for the race.

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