The Damflask Reservoir offers a nice opportunity for a scenic, flat, off-road run not far from Sheffield. There’s a 5k path around the perimeter of the reservoir, featuring nice views of the water and surrounding green hillside. The terrain is open and flat, and the footing is good — though it can get muddy when wet.

Google Street View

There are additional trails located to the north of the Reservoir. A combination of open and wooded terrain.