Snowdonia Marathon

Now run as Marathon Eryri A road loop through the mountains of North Wales, first run in 1982 and renamed in 2023. It starts near Llanberis, climbs the Llanberis Pass to Pen y Pass, drops to Beddgelert and climbs again from mile 13 to 15. The hardest test comes last: after the Waunfawr cut-off at mile 22, a steep, narrow track climbs to about mile 24, then a rough grass descent, muddy in the wet, leads to Llanberis High Street. The total climb is about 2,748 feet (840 meters), and late October weather can be harsh, so carry a layer and consider trail shoes. Entry is normally by ballot, but the 2026 race was canceled, so there is no ballot for 2027; the only way in is the waiting list for transferred places. The 2027 race is on October 30.