Simon Evans submitted the challenge:

Starting and finishing at the Warren House Inn (on the B3212), visit all 52 of the tors on Dartmoor that are at least 500m above sea level, in a sequence of your choosing. If the highest outcrop is not summited (e.g., if it's too technical), you can run the long way around the back of the tor.

The tors are defined following Ken Ringwood's book Dartmoor's Tors and Rocks, and are as follows (in alphabetical order): 

This route takes on 2 summits in the western Alps near the town of Chambéry - Pointe de la Galoppaz and Croix du Nivolet.  Start and finish at the Elephants Fountain in Chambéry.

Submitted by Mikey Sklar:

The Virgin River Rim Trail is a 32-mile point-to-point route near Cedar City, UT.  Mostly single track. The west starting/ending point is considered to be at Woods Ranch parking lot, near Cedar City, UT. The east starting/ending point is near Strawberry Point, UT. Although the trail begins about a mile away from Strawberry Point, the route should begin/end at the restroom parking area at Strawberry Point.