Snowdon24

Llanberis, United Kingdom • 11 Jul 2026

Event details

Black Diamond Yr Wyddfa | Snowdon24 2026 is a 24-hour ultra trail event held in Eryri (Snowdonia) National Park. The event takes place in Llanberis at Y Ganolfan on 11 July 2026. The challenge uses Yr Wyddfa (Snowdon), which rises to 1,085 m (3,560 feet). Starting and finishing are at the foot of the mountain. Tickets for this event are currently sold out. The event opening date for entries was 26 September 2025.

Format, distances and support

Participants have 24 hours to ascend and descend Yr Wyddfa as many times as possible. The event is UTMB-indexed and offers solo categories over the following distances:

  • 50k
  • 100k
  • 100-mile

Teams of up to five may enter in a relay format, with each team member contributing laps. The current solo record listed is eight full ascents. On-site provisions include an event village with toilets, food and shopping, rest areas and tent pitches, on-course marshals and Mountain Leader support, chip timing with tracking and online results. The event is bilingual in English and Welsh and lists Cancer Research Wales as its official charity partner. Visit the organization's website for the most recent information.

Race information

100 mi
100 Mile Utmb-Indexed Challenge
100 km
100k Utmb-Indexed Challenge
50 km
50k Utmb-Indexed Challenge
Visit the organization's website for the most recent information.
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