TrailUnited KingdomWales
OTT Marathon 2027
15.05.2027Merthyr Tydfil (United Kingdom)
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2 courses · 16.1–41.8 km10–26 mi
At a glance
OTT Marathon 2027 takes place on Saturday 15 May 2027 in Merthyr Tydfil (Wales, United Kingdom). Two distances to choose from: 16.1 and 41.8 km.
The organiser has not published the elevation gain yet.
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A true mountain challenge across the iconic Pen y Fan range, featuring steep climbs, technical trails, and wild weather.
2 courses
Course analysis
41.8 km26 mi1’493 m D+4’898 ft D+
57effort kmⓘ41.8 km on the map · feels like 57 km26 mi on the map · feels like 57 km
- D+
- 1’493 m4’898 ft
- D−
- 1’541 m5’056 ft
- Max alt.
- 881 m2’890 ft
- Steepest
- 20%
Segments
Elevation profile: 26 mi
193 m – 881 m633 ft – 2’890 ft
Feels like these
- BoslandTrail Run & Walk50.9 km31.6 mi · 52 km-effortAug 27, 2027604 km away375.3 mi away
- Harz-Gebirgslauf (Brocken-Marathon)42.2 km26.2 mi · 54 km-effortOct 9, 2027 · Dates to be confirmed972 km away604 mi away
- Trail des Châteaux31.7 km19.7 mi · 50 km-effortDec 12, 2026998 km away620.1 mi away
- The Alpenglow 10038 km23.6 mi · 55 km-effortJul 2, 20276’938 km away4’311.1 mi away
Where to stay
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