A 50 mile mixed terrain ultra marathon run on the The Preseli Hills, through Ancient Woodland and finishing on the Pembrokeshire Coastal Path.
This route really does take you over the best of Pembrokeshire's trail, set entirely in the Pembrokeshire Coast National Park.
Saturday April the 18th 2026 - 8am race start
Marreg Event information
A route through the most stunning parts of Pembrokeshire. You'll start at Foel Drygarn, near Crymych, then run across rugged hills, visit ancient woodland, and follow the Pembrokeshire coast path all the way to Whitesands, St David's.
This is a set route challenge that is self-nav (GPX, OS and Strava routes provided) with compulsory check points on the route that will have to be visited. There are several well stocked feed stations on the route and each runner will have a satellite tracker for safety.
You can expect:
- The very best trail running Pembrokeshire has to offer.
- Mixed terrain trails rugged hill trails, woodland, sandy beaches and flowing coastal path
- 5 x aid stations:
- 12 miles - Water, fruit, gels, cake
- 22 miles - Water, fruit, gels, cake
- 33 miles - Water, fruit, gels, cake
- 44 miles - Water, hot food, fruit, gels, cake
- 53 miles (finish) - Water, hot food, fruit, gels, cake
- A stunning finishers medal
- A to B route, with a bus ride to the start
This route has been designed to include as much variety as possible in a truly beautiful part of Wales.
Generous cut-off times allow for an average pace of roughly 18 minute miles. 53 miles in 16 hours.