XTERRA Snowdonia Trail Marathon Eryri Events
Sat 12 - Sun 13 Jul 2025 Caernarfon, Gwynedd, UK

XTERRA Snowdonia Trail Marathon Eryri Events

Welcome to the XTERRA Snowdonia Trail Marathon Eryri, a stunning Trail Marathon, Ultra Marathon, Half Marathon, 10K, and 24hr event starting and finishing in Wales' outdoor capital, Llanberis.

5 races

  • Sat 12 Jul 2025
  • #1 of 5
Llanberis, Caernarfon

10K

09:30

Age 17 & over

£31.99-£37.99

  • Sat 12 Jul 2025
  • #2 of 5
Llanberis, Caernarfon

Half Marathon

09:30

Age 17 & over

£44.99-£49.99

  • Sat 12 Jul 2025
  • #3 of 5
Llanberis, Caernarfon

Marathon

08:30

Age 18 & over

£57.99-£61.99

  • Sat 12 Jul 2025
  • #4 of 5
Llanberis, Caernarfon

Ultra Marathon

06:30

Age 20 & over

£94.99-£104.99

  • Sat 12 - Sun 13 Jul 2025
  • #5 of 5
Llanberis, Caernarfon

Black Diamond Yr Wyddfa Snowdon24

10:00

Age 18 & over

£121.99-£251.99

Event overview

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, marathon and 24hr event 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.

  • Support and fuel

    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 Snowdonia Trail Marathon and Half Marathon are the Xterra Trail Run World Championship.

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.

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

Kit

A list of compulsory and advisable kit is readily available.

Walking poles

You are permitted to carry and use walking poles if you wish to.

Families

The event village is family-friendly and is at a location with lots on offer for families. There'll be a great atmosphere for spectators who can track the person they are supporting using an app so they don't miss them at key points.

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

Event HQ

Llanberis
Llanberis
Caernarfon
Gwynedd
LL55
UK

Llanberis, North Wales has superb transport links and is incredibly easy to find.

Registration

Registration is located on the event field in Llanberis situated next to the Community Centre - LL55 4UR.

location

Parking

Parking information is included in your Final Instructions email. Please be considerate to local residents when parking and use official event parking or pay and display car parks.

By car

There’s quick, straightforward access from the North West along the M56 and A55. Motorway links with the Midlands are good too, and the same roads – the M6, M5 and M1 – also bring Snowdonia within easy reach of the South of England

By rail

Direct services (including direct trains from London to Bangor) take you to the popular North Wales coastal destinations from most parts of Britain.

The closest station to Llanberis is Bangor, which is just under 10 miles away. A taxi from here will cost approximately £25. The Sherpa S2 bus will take you from the station and cost between £3-£5. It is possible to cycle.

By sea

Irish Ferries and Stena Line operate regular and high-speed services to Holyhead from Dublin.

By air

Transfers from the international gateways of Manchester, Liverpool and Birmingham take less than two hours.

Accommodation

Llanberis and the surrounding areas offer a wide range of hotels, bed and breakfast, campsites and hostels.

The Royal Victoria Hotel is recommended.

  • Bring your own cup
  • Plastic bottle free
  • Plastic-free event
  • Public transport links
  • Recycling
  • Reusable cups
  • Sustainability policy

As a local Welsh company the organiser's goal is to showcase the beautiful natural environment without causing harm. Event since their first race in 2011, they have avoided plastic bottles, offered locally-sourced Welsh slate finisher mementoes and have lead on sustainability in events.

If you are looking for a challenge, the Snowdonia Trail Race 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. Luke Royle (2019) RaceCheck

Absolutely AMAZING day - so well signposted, not the slightest chance of getting lost and wonderful camaraderie amongst all runners. I met some really wonderful people at various points on the course and it really keeps you going strong!!! Anonymous post-event feedback 2023

Loved running the marathon - many thanks for what was the best organised trail event I’ve done. The Marshalls were brilliant.  Post event feedback 2023

 

 

My first trail marathon and what can I say but 'WOW’. Adam Gurney, Racecheck

Race village, route marking, feed stations, marshals, views and sense of achievement at the very highest standard. Do it! Matt Hall (2022) RaceCheck

Races at event

  • Sat 12 Jul 2025
  • #1 of 5
Llanberis, Caernarfon

10K

09:30

Age 17 & over

£31.99-£37.99

  • Sat 12 Jul 2025
  • #2 of 5
Llanberis, Caernarfon

Half Marathon

09:30

Age 17 & over

£44.99-£49.99

  • Sat 12 Jul 2025
  • #3 of 5
Llanberis, Caernarfon

Marathon

08:30

Age 18 & over

£57.99-£61.99

  • Sat 12 Jul 2025
  • #4 of 5
Llanberis, Caernarfon

Ultra Marathon

06:30

Age 20 & over

£94.99-£104.99

  • Sat 12 - Sun 13 Jul 2025
  • #5 of 5
Llanberis, Caernarfon

Black Diamond Yr Wyddfa Snowdon24

10:00

Age 18 & over

£121.99-£251.99