This park encompasses Smoothwater Lake, Makobe Lake, the Ishpatina Ridge (highest point in Ontario), Maple Mountain (highest vertical rise in Ontario), and most of the Lady Evelyn River. It lies within the Eastern forest-boreal transition ecoregion. It is well known for its protection of some of the last remaining stands of old growth forest in Ontario, as well as the two fire towers on top of Ishpatina and Maple Mountain.