A 51 km (32 mile) point-to-point ultramarathon from Berkhamsted to Wendover with around 996 m of climbing. The route passes through the Ashridge Estate before joining long-distance trail corridors across the Chilterns, using a mix of woodland trail, chalk and dirt paths, and firmer track. The elevation comes through frequent ups and downs rather than extended climbs. The organiser’s website sets out whether the course is fully marked or relies on GPX, along with aid station locations and any mandatory kit requirements.