Sea 2 Summit - Offa's Dyke Half/Full/Ultra

Sea 2 Summit - Offa's Dyke event

Sea 2 Summit - Offa's Dyke is a trail running event on the Offa's Dyke National Trail. The route starts at Prestatyn seafront and follows the National Trail south into the Clwydian Hills. The event finishes on hill summits: Moel y Parc for the half, Moel Gyw for the full marathon, and Horseshoe Pass for the ultra. The 2026 ultra distance is 55.5 km and finishes at Horseshoe Pass, with a descent from Cyrn y Brain to the road.

Event details and practical information

• Distances:
  • Half Marathon (plus a bit!) - finishes at Moel y Parc Summit
  • Full Marathon - finishes at Moel Gyw Summit
  • Ultra Marathon - 55.5 km, finishes at Horseshoe Pass Summit

Checkpoint locations are given along the route, including Mynydd y Cwm (11 km), Grove Hall Bodfari (20 km), Bwlch Penbarras (41 km), and Llandegla (48 km). The event uses GPS tracking and provides a route map. Coach travel is available to ticket holders from the finish car park to locations including Bodfari, Clwyd Gate and Horseshoe Pass. Organisers require a minimum kit for all participants because of terrain and winter weather. Required items include a full body waterproof cover, hat and gloves, spare thermal top, foil blanket, route map, whistle, fully charged mobile phone and at least 500 ml of water to start. The event is based at Prestatyn Nova Centre and takes place on 6 December 2026. Visit the organization's website for the most recent information.