Sun 13 Jul 2025 Caernarfon, Gwynedd, UK

XTERRA Snowdonia Trail Marathon Eryri

The most epic trail marathon in Wales! Iconic and spectacular trails, circumnavigating then climbing the slopes of Wales' highest peak - Yr Wyddfa (Snowdon).

  • Sun 13 Jul 2025
Llanberis, Caernarfon

Marathon

08:30

Age 18 & over

£51.99-£119.99

  • 27.3 miles trail running + 1685 m ascent

Overview

Entering the XTERRA Snowdonia Trail Marathon is your ticket to compete in one of the UK's most challenging trail races.

runners

The incredible routes explore the trails, gorgeous panoramic views and tough climbs that make Snowdonia National Park so popular with 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!

Highlights

  • One of the UK's most challenging trail races

    The ultra and marathon are UTMB-indexed.

  • XTERRA Trail Run World Series

    The marathon and half marathon are part of the World Series.

  • Spectacular scenery

    Unbeatable views across Eryri (Snowdonia).

  • Lively event village

    Music, commentary, shopping, food, kit demos and toilets.

  • Family friendly vibes

    Family finishes and plenty to see and do.

  • On course support

    Friendly marshals, signage, energy stations and support vehicles.

  • Unique finisher mementos

    Beautifully designed to reflect our event locations and local history.

  • Professional timing

    Chip timing, live tracker and online results.

World Series

The XTERRA Trail Run World Series connects the entire trail running community through a global rankings system, regional championships, and for those who qualify - the XTERRA Trail Run World Championship.

This event is part of XTERRA Snowdonia Trail Marathon Eryri Events.

Event details

  • All fitness levels
  • Event expo
  • Event village
  • Families
  • Free venue entry
  • Newcomers
  • Spectators
  • Traders at event

Location

  • Bag storage
  • Cafe
  • Mountains
  • Paid parking
  • Toilets

Route

  • First aid
  • Food stations
  • Marshals
  • Mass start
  • Mountainous
  • No headphones
  • Out and back
  • Sweeper
  • Water stations

Sustainability

  • Plastic bottle free
  • Plastic-free event
  • Public transport links
  • Recycling
  • Reusable cups
  • Sustainability policy

What's included

  • Chip timing
  • Eco medal
  • Event app

Entries

  • Age 18 & over
  • Entries open
  • Enter online
  • Series discount

Other races at event

  • Sun 13 Jul 2025
  • #1 of 4
Llanberis, Caernarfon

10K

09:30

Age 17 & over

£28.99-£37.99

  • 9.8 km trail running
  • Sun 13 Jul 2025
  • #2 of 4
Llanberis, Caernarfon

Half Marathon

09:00

Age 17 & over

£39.99-£92.99

  • 12.9 miles trail running
  • Sun 13 Jul 2025
  • #4 of 4
Llanberis, Caernarfon

Ultra Marathon

06:30

Age 20 & over

£94.99-£104.99

  • 57 km trail running + 2199 m ascent
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