A backyard-format endurance event held in south-west England using a fixed loop of 4.167 miles (6.7 km) completed every hour on the hour until only one runner completes a final solo lap. Terrain typically consists of mixed trail, grass and rural paths with modest elevation repeated each lap. Runners return to a central base area between laps where aid and personal support are available. The race operates under standard backyard ultra rules, with venue details defined by the organiser.