A 50 km trail ultramarathon in the Chiltern Hills following woodland trails, chalk paths and ridge routes across the Area of Outstanding Natural Beauty. The course includes sustained climbs and descents across rolling terrain rather than extended mountain ascents. Surfaces vary between compact trail, dirt track and grass paths. Aid stations are positioned along the route in accordance with Maverick Race event formats.

• Other races at the same event:
Shorter trail distances (typically marathon and half marathon options)