Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, kilometre by kilometre.
Race-day light
For a 15:45 finish (an estimate) · starting 07:00 15 May · headlamp km 99–the finish. Dark means the sun below civil twilight.
Climbs
10 climbs · 5,422 m totalbiggest firstConditions typical race-day weather for 15 May at the start
Typical = the median of 2016–2025 for 15 May ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac the sky on race day
Next race day Sat, May 15, 2027 · 7:00 AM start
First and last light are civil twilight, the sun 6° below the horizon. The moon is lit as at midnight after the start; headlamp hours count a typical finish from the start while the sun is below civil twilight. Worked out for the start line.
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About this course
Eryri by UTMB Eryri 100K — 2027 covers 106.3 km (66.0 mi) with 5,971 m (19,590 ft) of elevation gain. That is about 56 m per km of climbing, and 5,970 m of descent. The course tops out at 1,066 m and bottoms out at 68 m. The profile has 10 sustained climbs; the biggest is the climb from km 69.5, +996 m over 6.5 km at 15.2% on average (steepest stretch 42%). Race day is 15 May 2027, starting at 07:00; the sun rises at 05:19 and sets at 21:08. Typical race-day weather at the start: a high of 15°C and a low of 8°C, with a 44% chance of a wet day. The interactive map above shows the full route with its elevation profile and aid stations, built from the course's GPS file.
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Course history
- Nov 1, 2026Added to the catalog
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