Marathon Eryri
Marathon Eryri is a demanding mountain-road classic around Yr Wyddfa, with two major climbs, a short farm-track sector, and rugged Welsh weather.
Quick facts
- Mountain-road loop around Yr Wyddfa with two major sustained climbs.
- Late Bwlch y Groes ascent is the course's defining test.
- Roughly two kilometers of farm track interrupt an otherwise paved route.
- Ballot entry reflects a limited field and consistently high demand.
Is registration open for the 2026 Marathon Eryri?
Registration for the 2026 Marathon Eryri is closed.
About the Marathon Eryri
Marathon Eryri, long known as Snowdonia Marathon, is one of the UK's defining mountain road marathons. The race circles Yr Wyddfa through Eryri National Park and uses a ballot to manage demand for its limited field.
Course
The route climbs Pen y Pass early, rolls through mountain valleys, and saves a steep Bwlch y Groes ascent for the final quarter. Most of the course is paved, with a short farm-track section adding rougher footing before the finish in Llanberis.
Race-day weather
Late October in Eryri can produce rain, wind, cold ridge exposure, and sudden visibility changes. Runners should prepare for mountain weather even when Llanberis feels mild.
Past Marathon Eryri dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Saturday, October 24, 2026 | — | — |
| 2025 | Saturday, October 25, 2025 | Results available | Open results |
Your race experience
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Marathon Eryri FAQ
When is the Marathon Eryri?
The 2026 Marathon Eryri is on Saturday, October 24, 2026.
Is registration open for the 2026 Marathon Eryri?
Registration for the 2026 Marathon Eryri is closed. View the official registration details at marathoneryri.com.
Does the Marathon Eryri have live tracking?
Marathon Scout does not list an official live-tracking link for the 2026 Marathon Eryri yet. We only add a tracker after the race or its timing provider publishes it.
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