Lady Evelyn-Smoothwater Provincial Park is a remote park in northeastern Ontario, Canada, near Lake Temagami. It is one of the several provincial parks located in the Temagami area.
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.
As a wilderness park, there are few services offered to visitors but it is ideal for backcountry canoeing, nature exploration and wildlife viewing.
Lady Evelyn-Smoothwater Provincial Park includes many waterfalls, such as Helen Falls, which is the highest and most impressive waterfall on the Lady Evelyn River.