The Opeongo River is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in the Saint Lawrence River

Saint Lawrence River

The Saint Lawrence is a large river flowing approximately from southwest to northeast in the middle latitudes of North America, connecting the Great Lakes with the Atlantic Ocean. It is the primary drainage conveyor of the Great Lakes Basin...

 drainage basin

Drainage basin

A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

 in Nipissing District in northeastern

Northeastern Ontario

Northeastern Ontario is the region within the Canadian province of Ontario which lies north and east of Lakes Superior and Huron.Northeastern Ontario consists of the districts of Algoma, Sudbury, Cochrane, Timiskaming, Nipissing and Manitoulin; and the single-tier municipality of Greater...

 Ontario

Ontario

Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

. The river is entirely within Algonquin Provincial Park

Algonquin Provincial Park

Algonquin Provincial Park is a provincial park located between Georgian Bay and the Ottawa River in Central Ontario, Canada, mostly within the Unorganized South Part of Nipissing District. Established in 1893, it is the oldest provincial park in Canada. Additions since its creation have increased...

 and Opeongo River Provincial Park

Opeongo River Provincial Park

Opeongo River Provincial Park is a non-operating waterway park in Nipissing District in northeastern Ontario, Canada. It incorporates those portions of the Opeongo River from its exit from Algonquin Provincial Park to the river's mouth at the Madawaska River, except for a small portion around...

, except for a small portion around Victoria Lake, and is a left tributary of the Madawaska River

Madawaska River (Ontario)

The Madawaska River is a river in Ontario, Canada. The river is long and drains an area of . It originates at Source Lake in the highlands of Algonquin Park at an elevation of and flows east, dropping before emptying into the Ottawa River at Arnprior....

.

Course

The river begins in Algonquin Provincial Park at the outflow from Annie Bay on the East Arm of Opeongo Lake in geographic Preston Township, in the Unorganized South Part of Nipissing District, controlled by the Opeongo Lake Dam and flows southeast to Booth Lake. It exits the lake east controlled by the Booth Lake Dam, enters geographic Clancy Township, exits Algonquin Provncial Park into Opeongo River Provincial Park

Opeongo River Provincial Park

Opeongo River Provincial Park is a non-operating waterway park in Nipissing District in northeastern Ontario, Canada. It incorporates those portions of the Opeongo River from its exit from Algonquin Provincial Park to the river's mouth at the Madawaska River, except for a small portion around...

 and reaches Victoria Lake. The river leaves the lake at the northeast over a dam and continues southeast, passes from Unorganized South Nipissing District into the geographic Dickens Township in the municipality of South Algonquin, passes through a series of rapids, takes in the left tributary Aylen River, turns southwest, and empties into Bark Lake

Bark Lake (Ontario)

Bark Lake is a lake in the Township of South Algonquin, in Nipissing District in Ontario, Canada. It lies near Madawaska, Ontario on the Madawaska River where the tributary Opeongo River joins.-References:...

 on the Madawaska River, at the Ontario Highway 60 bridge and east of the community of Madawaska. The Madawaska River flows via the Ottawa River

Ottawa River

The Ottawa River is a river in the Canadian provinces of Ontario and Quebec. For most of its length, it now defines the border between these two provinces.-Geography:...

to the Saint Lawrence River.

Tributaries

• Aylen River (left)
• Victoria Lake
  • McNevin Creek (right)
• Shall Lake
  • Oram Creek (right)
  • Shall Creek (left)
• Crotch Lake
  • Shirley Creek (left)
  • Robin Creek (left)
• Bridle Creek (left)
• Booth Lake
  • Rumley Creek (right)
  • Cob Creek (right)
  • McCarthy Creek (right)
  • Chipmunk Creek (left)
• Tip Up Creek (left)