2026 Cybi Coastal Marathon - Aug 1

Loop (coastal trail) marathon course in Holyhead with 200m elevation gain. A tough, scenic single-loop trail marathon that circumnavigates Holy Island (Ynys Cybi) on the Anglesey Coastal Path. The route sticks mostly to the waymarked coastal path with a few small diversions to bring it in at the full marathon distance (26.2 miles / 42.195 km), but it is not a certified road course, so it does not count as a Boston qualifier. Total climbing is around +200 m, with the signature sting being a short