Trail Running | Snowdonia Trail Marathon 2021

Snowdonia Trail Marathon 2021 Trail Running Ultra Marathon

The Ultra encompasses 7000ft of climbing over 60km and visits the beautiful Cwm Tresgl and Cwm Pennant before rejoining the Marathon Route to ascent Snowdon.

The Ultra Marathon is a UTMB qualifying race and will earn finishers 3 ITRA points.





Route Description

The Ultra route takes the Marathon route up Maesgwm with views of Snowdon, then it drops down towards Rhydd Ddu. Upon reaching Beddgelert Forest the Ultra route breaks away from the Marathon route to explore the beautiful Cwm Tresgl and Cwm Pennant before rejoining the Marathon Route again and working its way along the Afon Glaslyn and Llyn Gwynant to the ascend up Snowdon to the Finger Stone via the PyG track. Once at the Finger Stone runners will descend Snowdon by the Llanberis Path all the way to the Finish line. This route is a trail running enthusiasts paradise, with mountain, forest, stone path, slate quarries and tracks it isn’t hard to keep motivated the whole way around.


General Sale



Important Information

Minimum Age


Start Time

Cut Off Times


Compulsory Kit

Covid-19 Information

Are you in?

See Start List

Final Instructions

Will be sent out and available to download 1 week before the event.

We are proud that all our events are bi-lingual. Signage, registration and commentary is available in both English and Welsh.

Event Partners Snowdonia Trail Marathon 2021


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