The Dursley Dozen is now in its 31st year and is established as one of the toughest off-road races around and run under the ARC rules.

A multi-terrain race of twelve miles over hillsides, roads, woodland, open country, mud, more mud, and solid rock. The course sets off steeply up a road for 200 metres and the ascends a woodland track to the top of Stinchcombe hill.

http://www.dursleyrunningclub.org.uk/