At 44 km long, the Carp River is the only river that flows entirely within the boundaries of the City of Ottawa.
The Carp River is a navigable waterway that comes under the jurisdiction of the Federal Fisheries Act. The river’s watershed drains an area of roughly 306km2 spread across Stittsville, Kanata, and West Carleton. The headwaters originate near the Stony Swamp Wetland Complex on NCC land (Old Quarry Trail, P5) at Eagleson Road near Hazeldean Road in Kanata. The upper Carp River (also called Carp Creek) runs southwest from Appaloosa Park under Eagleson Road through Glen Cairn where it empties into the marshes and storm water ponds south of the Canadian Tire Centre. From there it flows north for about 42 km through West Carleton into the Ottawa River at Fitzroy Harbour.
The Carp River has four major tributaries: Poole Creek, Feedmill Creek, Huntley Creek, and Corkery Creek.