International Snowdon Race
Llanberis, United Kingdom • 18 Jul 2026
International Snowdon Race (Râs Yr Wyddfa) 2026
The International Snowdon Race, listed as the 49th running of Ras yr Wyddfa, takes place on Saturday 18 July 2026. The course length is 15.35 km with a recorded elevation gain of 994 m. The route comprises 7.16 km of ascent, 7.19 km of descent and about 1 km of flat terrain. The average ascent grade is 13.4 percent with a maximum of 32 percent.
Entry and administration are managed online through TDL Events. Registration for past entrants opens 1 March 2026 and registration for all eligible runners reopens 15 March 2026; entries close automatically when the race limit is reached. The race operates a no refund policy. Changes of name or entrant details are permitted up to 8 June 2026; after that date no changes are possible.
Competitors must be at least 18 years old and have mountain running experience or prior participation in a mountain race. Race regulations require that race numbers be collected in person and displayed on the front of the vest. Electronic timing is fitted to the race number. Retiring runners should report to a marshal or the finish line where possible. A cut off of 1 hour 05 minutes at Clogwyn applies in all conditions and organisers may require windproof or waterproof body cover plus hat and gloves in adverse weather. The event is run under UK Athletics rules. Participants accept the risks inherent in mountain running. Visit the organization's website for the most recent information.