The Castor River is a river in eastern 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....

, in 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...

. It flows into the South Nation River

South Nation River

The South Nation River is a river in Eastern Ontario, Canada. It springs from forests and marshes located north of Brockville and it flows 175 km northeast to empty into the Ottawa River north of Plantagenet...

 near Casselman

Casselman, Ontario

Casselman is a village in eastern Ontario, Canada, in the United Counties of Prescott and Russell on the South Nation River.It is a village on the Trans-Canada Highway 417 between Ottawa and Montreal at the crossroads of Regional Road 7, about 55 km southeast of downtown Ottawa. Highway 138 to...

. It has a number of branches, including the North, Middle, South and East Castor Rivers which join in Embrun

Embrun, Ontario

Embrun (ˈɛmbrən in English; ), UN/LOCODE: CA EBU, is a community in the Canadian province of Ontario in the Eastern Ontario region. Embrun is also part of the National Capital Region. Embrun is part of the larger Russell Township in Prescott and Russell United Counties...

. The river was named for the many beaver

American Beaver

The North American Beaver is the only species of beaver in the Americas, native to North America and introduced to South America. In the United States and Canada, where no other species of beaver occurs, it is usually simply referred to as "beaver"...

 dams found in its watershed; "castor" means "beaver" in French

French language

French is a Romance language spoken as a first language in France, the Romandy region in Switzerland, Wallonia and Brussels in Belgium, Monaco, the regions of Quebec and Acadia in Canada, and by various communities elsewhere. Second-language speakers of French are distributed throughout many parts...

.

Communities on the Castor River include:

• Russell
  Russell, Ontario (community)
  The Village of Russell is part of the Township of Russell which in turn is located in the United Counties of Prescott and Russell which covers part of Eastern Ontario, Canada...
  
  
• Embrun
  Embrun, Ontario
  Embrun (ˈɛmbrən in English; ), UN/LOCODE: CA EBU, is a community in the Canadian province of Ontario in the Eastern Ontario region. Embrun is also part of the National Capital Region. Embrun is part of the larger Russell Township in Prescott and Russell United Counties...
  
  
• Forest Park
• Kenmore
  Kenmore, Ontario
  Kenmore is a village in eastern Ontario, Canada. Located in Osgoode Ward, it is now part of the city of Ottawa, and consists of a small commercial centre flanked by two small residential neighbourhoods and farmland...