Course
A 24-hour lapped mountain race on Yr Wyddfa, starting and finishing at the base and repeating the ascent and descent of Wales' highest peak for as many laps as possible; the solo record stands at eight. Marshals and Mountain Leaders support the route. Entered solo or as a relay team of up to five, with an event village offering food, rest areas and a silent respite zone.
Key dates
- ·RegistrationNot open yet
- ★Race dayJuly 2027 · date to be announced
About
Yr Wyddfa (Snowdon) is the highest mountain in Eryri (Snowdonia) and England and Wales. It peaks at an impressive 1,085 m (3,560 feet). Starting and finishing at the foot of this iconic mountain, your challenge is to ascend and descend Yr Wyddfa as many times as possible in 24 hours.
Save Black Diamond Yr Wyddfa | Snowdon24 2026 to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
-
Tenacious Ten Hour Endurance Challenge
Ten-hour lap challenge across technical Black Mountains terrain
-
Chirk 10K
Runs through Chirk, home to Chirk Castle
-
Snowdonia Trail Marathon Eryri
Beneath Yr Wyddfa, through Beddgelert and Nant Gwynant
-
Dragon Coastal Ultramarathons
100 to 30 miles along the wild Wales Coast Path
A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.