Snowdon24

This edition has finished
JUL
11
2026
A 24 hours ultra trail event from Llanberis that challenges solo runners or relay teams to ascend Yr Wyddfa as many times as possible. UTMB indexed distances and on course support are provided, with an official charity partner.
Sat 11 Jul 2026
UTMB 50K/100K/100M 100 miles 100 kilometers 50 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Yr Wyddfa | Snowdon24

Yr Wyddfa | Snowdon24 is a 24 hour ultra trail running challenge based at the foot of Yr Wyddfa (Snowdon) in Llanberis. Yr Wyddfa is the highest mountain in Eryri (Snowdonia) and in England and Wales, peaking at 1,085 m (3,560 feet). The event asks participants to ascend and descend the mountain as many times as possible within 24 hours.

Entries are available for solo runners and for teams of up to five running in a relay format. Individual challenge options include:

  • 50k UTMB indexed challenge
  • 100k UTMB indexed challenge
  • 100 mile UTMB indexed challenge

The event village provides toilets, food, shopping, music and commentary during daylight hours. Facilities include rest areas with tent pitches and a chill out zone. On course support includes marshals, route signage and Mountain Leader support. Timing is managed with chip timing, tracking and online results. Finishers receive event mementos designed to reflect the location and local history. The event is bilingual with services available in English and Welsh.

The event lists Cancer Research Wales as its official charity partner and allows fundraising for this and other charities. The public record for laps completed during the 24 hour challenge is noted as eight laps. Visit the organization's website for the most recent information.

Events nearby

Two long distance trail races on the Snowdonia Slate Trail that pass slate heritage sites, include aid stations, GPS tracking and strict mountain safety requirements.
A guided 55 km linear run across Anglesey with over 2000 m of ascent, five supported sections, and entry options including a member rate.
A 16.1 km fell race around Penmaenmawr with 594 m ascent, partial route marking and an early start option for slower runners; entry is online only (£12).
A guided 10 km trail run from the Sychnant Pass summit featuring runnable terrain, regular stops and a steady group pace on an upland route.
Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.