Xterra Snowdonia Trail Marathon Eryri

The XTERRA Snowdonia Trail Marathon Eryri is a premier trail running event held in the stunning Eryri (Snowdonia) National Park, North Wales, starting and finishing in the adventure town of Llanberis. Scheduled for July 11, 2026, it offers four race distances: Ultra Marathon (57 km), Marathon (27.3 miles), Half Marathon (12.9 miles), and 10k (9.8 km). The challenging courses traverse iconic landscapes including Rhyd Ddu, Beddgelert, Nant Gwynant, Pen y Pass, and the summit of Yr Wyddfa (Mount Snowdon), Wales' highest peak.

The event features a lively village atmosphere with music, food, and support, and is part of the XTERRA Trail Run World Championship series. Visit the organization's website for the most recent information.