RunThrough Snowdonia Sea2Sky 54k 25k & 12k Trail Races September 2026

An all-terrain adventure in the heart of Eryri. RunThrough Snowdonia Sea2Sky offers big views, honest climbs, and memorable miles across rugged Welsh landscapes. This route takes you from Barmouth beach to the summit of Cadair Idris and back. The course mixes coastal viewpoints, forest tracks, rocky paths, and open mountain trails. You'll see panoramic scenery throughout, with a finish that feels electric.