Sea 2 Summit - Offa's Dyke Half/Full/Ultra
Prestatyn, United Kingdom • 7 Dec 2025
Event overview
Sea 2 Summit - Offa's Dyke offers three distance races along the Offa's Dyke footpath, starting at Prestatyn seafront. Distances offered:
- Half Marathon
- Full Marathon
- Ultra - 33 Miles
The Ultra finishes at the summit of Cyrn y Brain above the Horseshoe Pass. The event is electronically timed and finishers receive a medal. Registration requires choosing between two start time groups, with those expected to take longer starting earlier.
Course and logistics
The route follows the well marked National Trail from the coast south into the Clwydian Hills. There are multiple checkpoints on the course, including locations at Mynydd y Cwm, Grove Hall (Bodfari), Clwyd Gate and Llandegla; cut-off controls apply at these checkpoints. Finish locations for each distance are on nearby summits, with a 25-35 minute walk down to recommended pick up points from each summit.
Coach travel is available on a first-come, first-served basis. Competitors are advised to have a support driver available in case they need to leave early. There are no independent route markings while on the Offa's Dyke footpath until the final climb to each summit.
Mandatory kit
All participants must carry a minimum kit because of the terrain and potential for bad weather. Required items include: Visit the organization's website for the most recent information.
- full body waterproof cover
- hat and gloves
- spare thermal top
- foil blanket
- route map and compass
- whistle and fully charged mobile phone
- at least 500 ml of water to start