https://www.thedragon.us/the-dragon-trail/trail-map/

A 40-mile mixed-use natural surface trail, completed in 2024, that circles the Hardy Pond and crosses over the world's third largest earthen dam, the Hardy Dam.

This is a circular route around 159 miles long which starts and finishes at the Plume of Feathers pub in Princetown, Dartmoor.

The route links all of the119 Dartmoor tors ("dramatic outcroppings of granite, usually on top of a hill") which can be accessed without crossing private land. 

Specifically: every tor within the  connected component of Open Access Land that is marked on OL28 as “something” space “tor”. 

Although your route may include other tors and tops marked on the map (or named locally), only these 119 tors count towards the challenge.