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TrailUnited KingdomWales

Snowdonia Trail Marathon Eryri2027

10.07 – 11.07.2027Llanberis (United Kingdom)
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3 courses · 21.2–56 km · up to 2’300 m D+

3 courses

  1. 21.2km

    1’250 m D+

    1’242 m D-

    avg 6%

    Snowdonia Trail Half Marathon Eryri
    UTMB Index 20K
    GPX

  2. 44km

    1’705 m D+

    386 m D-

    avg 4%

    Snowdonia Trail Marathon Eryri
    UTMB Index 50K
    GPX

  3. 56km

    2’300 m D+

    1’241 m D-

    avg 4%

    Snowdonia Trail Ultra Marathon Eryri
    UTMB Index 50K
    GPX

Course analysis

56 km2’300 m D+

79effort kmⓘ56 km on the map · feels like 79 km
D+
2’300 m
D−
1’241 m
Max alt.
989 m
Steepest
16%

Segments

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Elevation profile: Snowdonia Trail Ultra Marathon Eryri

108 m — 989 m

Feels like these

Race plan

Plan your race from start to finish.

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

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The race

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 Marathon, and 10K, all routes begin and finish in the vibrant mountain town of Llanberis, beneath the towering peaks of North Wales.

Where to stay

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