Trail Running  | XTERRA Snowdonia Trail Marathon Eryri 2025

XTERRA Snowdonia Trail Marathon Eryri 2025 Trail Running Half Marathon


13 Jul 2025




Route Description

This is one tough Half Marathon with over 1192m of ascent most of which is up Wales’ highest peak. The hills start almost immediately as you climb up through Llanberis and then Maesgwm, also known as Telegraph Valley. Turning left onto the Snowdon Ranger Path you have a further steep climb up before crossing the railway, reaching the Finger Stone and starting your descent down the Llanberis Path. The views, all the way to Anglesey, are incredible, but don’t get complacent you haven’t finished yet! Once back down at the road in Llanberis you are diverted through the woods past Dolbadarn Castle with the sting in the tail being the final climb up the infamous Zig Zag path and into the quarries. Reaching the top of Vivian Quarry you’ll be able to see the event village and the finish line down below and better yet, it's pretty much all downhill to the finish from here.


Tier 1 Price

Ends: 11/08/2024

  • £39.99

Tier 2 Price

Ends: 31/01/2025

  • £44.99

Tier 3 Price

Ends: 06/07/2025

  • £47.99

Tier 4 Price

Ends: 10/07/2025

  • £49.99

Half Marathon Duo Entry - Tier 1 Price

Ends: 11/08/2024

  • £79.99
  • See more info below

Half Marathon Duo Entry - Tier 2 Price

Ends: 06/07/2025

  • £92.99

Important Information


Team Duo Entries


Start Time

Cut-Off Times

Feed Stations

Prize giving

Compulsory Kit

XTERRA World Series

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 bilingual. Signs, registration and commentary are available in English and Welsh.

Event Partners XTERRA Snowdonia Trail Marathon Eryri 2025

Working with local communities