Sun 12 Jul 2026 Caernarfon, Gwynedd, UK Early bird

Snowdonia Ultra Trail Marathon Eryri

The original Snowdonia Ultra Marathon. A beautiful route boasting stunning views, a hearty ascent of Yr Wyddfa (Snowdon) and a thrilling 7km descent to a heroes' welcome at the finish line!

Enter now
  • Sun 12 Jul 2026
  • Early bird
Llanberis, Caernarfon
Ultra Marathon

Early bird on now

06:30

Age 20 & over

£97.99-£104.99

  • 57 km trail running + 7171 ft ascent

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 and 24hr event are UTMB-indexed.

  • 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.

This event is part of Snowdonia Trail Marathon Eryri Events.

Event details

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

Route

  • Cut off time
  • First aid
  • Food stations
  • Marshals
  • Mass start
  • Mountainous
  • No headphones
  • Out and back
  • Sweeper
  • Toilets
  • Water stations
  • GPX available

Location

  • Cafe
  • Mountains
  • Music
  • Paid parking
  • Secure bag storage
  • Toilets

What's included

  • Chip timing
  • Eco medal
  • Event app

Sustainability

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

How to enter

  • Age 20 & over
  • Entries open
  • Enter online
Enter now

Other races at event

  • Sat 11 Jul 2026
  • #1 of 0
Llanberis, Caernarfon
10K

09:30

Age 17 & over

£31.99-£37.99

  • 9.8 km trail running + 1335 ft ascent
  • Sun 12 Jul 2026
  • #2 of 0
Llanberis, Caernarfon
Half Marathon

09:00

Age 17 & over

£44.99-£49.99

  • 12.9 miles trail running + 3959 ft ascent
  • Sun 12 Jul 2026
  • #3 of 0
Llanberis, Caernarfon
Marathon

08:30

Age 18 & over

£59.99-£64.99

  • 27.3 miles trail running + 5433 ft ascent
  • Sat 11 - Sun 12 Jul 2026
  • #5 of 0
Llanberis, Caernarfon
Black Diamond Yr Wyddfa | Snowdon24

10:00

Age 18 & over

£121.99-£374.99

  • 24 hrs trail running + 3182 ft ascent

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4 steps to wellbeing
Sleep well

A good night's sleep is an essential foundation for a healthy lifestyle, effective training and weight control.

Train slow

Low-intensity training is easier for you, reduces the risk of injury and helps builds an efficient aerobic system.

Eat natural

Cut out sugar & junk food, reduce carbs, eat natural foods and train your body to burn fat for fuel.

Get outdoors

Fresh air, natural light and reconnecting with nature all help to improve mental and physical wellbeing.