Events / Trail Running

Snowdonia Trail Marathon 2021

Welcome to the Snowdonia Trail Marathon 2021, a stunning Trail Marathon, Ultra Marathon, Half Marathon and 10k, starting and finishing in Wales' outdoor capital, Llanberis. Entering the Snowdonia Trail Marathon is your ticket to compete in one of the UK's most challenging trail races.

The incredible routes explore the trails, gorgeous panoramic views and tough climbs that make Snowdonia National Park such a mecca for outdoor enthusiasts. Visiting Rhyd Ddu, Beddgelert, Nant Gwynant, Pen y Pass and Snowdon, there surely can't be a more striking trail marathon route in the UK!

The Ultra Marathon and Marathon have also been recognised as UTMB qualifying races. The Ultra will earn finishers 3 ITRA points and the Marathon 2 ITRA points.


11 Jul 2021



Choose your distance


Snowdonia Trail Marathon 2021


11 Jul 2021

Run: 9.8km

Find out more Snowdonia Trail 10K 2021

Snowdonia Trail Marathon 2021

Half Marathon

11 Jul 2021

Run: 12.9miles

Find out more Snowdonia Trail Half Marathon 2021
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Snowdonia Trail Marathon 2021


11 Jul 2021

Run: 27.3 miles

Find out more Snowdonia Trail Marathon 2021
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Snowdonia Trail Marathon 2021

Ultra Marathon

Run: 59.8km

Find out more Snowdonia Trail Ultra Marathon 2021

What's Included

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Lively Event Village

Music, commentary, shopping, food, secure bag drop and toilets

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Family Friendly Vibes

Family finishes and plenty to see and do

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On Course Support

Friendly marshals, signage, energy stations and support vehicles

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Unique Finisher Momentos!

Beautifully designed to reflect our event locations and local history.

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Spectacular Scenery

Unbeatable views across Snowdonia

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Professional Timing

Chip timing, live tracker and online results

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'If you are looking for a challenge, the Snowdonia Trail Marathon is up there with the toughest in the U.K. A punishing and beautiful experience in equal measure, ensure this one is on your bucket list'.

2019 Participant

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