TrailUnited KingdomWales

Snowdonia Trail Marathon Eryri 2027

10.07 – 11.07.2027Llanberis (United Kingdom)

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3 courses · 21.2–56 km13.1–34.8 mi · up to 2’300 m D+up to 7’546 ft D+

At a glance

Snowdonia Trail Marathon Eryri 2027 takes place from Saturday 10 to Sunday 11 July 2027 in Llanberis (Wales, United Kingdom). Three distances to choose from: 21.2, 44 and 56 km.

Longest course: Snowdonia Trail Ultra Marathon Eryri, 56 km with 2’300 m D+ (41 m per km: mountain terrain). Terrain: 71% trail, 11% forest track and 18% road. Terrain data: © OpenStreetMap contributors.

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Set in the heart of Eryri (Snowdonia) National Park, the Snowdonia Trail Marathon Eryri is one of the UK’s most iconic mountain running events. With four race distances: Ultra Marathon, Marathon, Half…

From the organiser

3 courses

21.2km13.1mi
1’250 m D+4’101 ft D+
1’242 m D-4’075 ft D-
avg 6%
Snowdonia Trail Half Marathon Eryri
GPX
44km27.3mi
1’705 m D+5’594 ft D+
386 m D-1’266 ft D-
avg 4%
Snowdonia Trail Marathon Eryri
GPX
56km34.8mi
2’300 m D+7’546 ft D+
1’241 m D-4’072 ft D-
avg 4%
Snowdonia Trail Ultra Marathon Eryri
GPX