Snowdon24
Llanberis, United Kingdom • 11 Jul 2026
Black Diamond Yr Wyddfa | Snowdon24 2026
Black Diamond Yr Wyddfa | Snowdon24 is a 24-hour ultra trail running event held on Yr Wyddfa (Snowdon) in Eryri (Snowdonia). Yr Wyddfa is listed at 1,085 m (3,560 feet). The course starts and finishes at the foot of the mountain and requires participants to ascend and descend the peak as many times as possible within 24 hours. The current solo record is eight full ascents. The event is UTMB-indexed and includes solo distance categories used for UTMB Mont Blanc qualification or preparation.
Format, categories and event services
Entries are offered for solo runners and teams, including pair and relay teams of up to five people. Solo categories include the following UTMB-indexed distances:
- 50k
- 100k
- 100-mile
On-course support includes marshals, signage and Mountain Leader support. Event services listed for participants include chip timing with tracking and online results, an event village with toilets and food, rest areas and tent pitches, and finisher mementos. The official charity partner is Cancer Research Wales; fundraising for other charities is also accepted. The event is bilingual, with signs, registration and commentary available in English and Welsh. The listed event location is Y Ganolfan, Llanberis, and the scheduled date is 11 July 2026. Visit the organization's website for the most recent information.