This backcountry park is made up of two parallel rivers, each running north for about 60 kilometres until converging on Kapuskasing Lake. This is moose country. It is also waterfowl habitat, with significant wetlands interspersed among the boreal forests. The rocks in the Nemegosenda -- both the lake and the river -- date from the Precambrian era, around two to three billion years ago. There are no park facilities, but visitors may enjoy backcountry canoeing, camping and fishing. Hunting is not permitted. Access is via portage 12 on a logging road from Chapleau; via the railway station at Elsas; or via Emerald Lake along Highway 101.