About 23 fish species have been identified in the Groundhog River, including self-sustaining population of lake sturgeon which are provincially rare to uncommon.

[3] The river begins at Horwood Lake in geographic Keith Township[4] in the Unorganized North Part of Sudbury District.

The river continues north under Ontario Highway 101, passes over the Upper Falls and series of unnamed cataracts and enters Cochrane District at geographic Enid Township.

It was established in 2006 and is meant for remote canoe camping for advanced canoeists, as well as fishing, hunting, and nature watching.

[3][12] Because of its length, the park features about 22 different landform vegetation combinations, of which weakly broken ground moraine and lacustrine deposits are the dominant types.