Lake of Two Mountains is part of the river delta

River delta

A delta is a landform that is formed at the mouth of a river where that river flows into an ocean, sea, estuary, lake, reservoir, flat arid area, or another river. Deltas are formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river...

 widening of 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:...

 in Quebec

Quebec

Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....

, 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...

, where it feeds into the St. Lawrence River.

Lake of Two Mountains has four outflows: Rivière des Mille Îles

Rivière des Mille Îles

The Rivière des Mille Îles is a channel of the Ottawa River in southwestern Quebec, Canada and runs into the Rivière des Prairies....

 and Rivière des Prairies

Rivière des Prairies

The Rivière des Prairies is a delta channel of the Ottawa River in southwestern Quebec, Canada....

, bordering Île Jésus

Île Jésus

Île Jésus is an island in southwestern Quebec, separated from the mainland to the north by the Rivière des Mille Îles, and from the Island of Montreal to the south by the Rivière des Prairies....

, and two branches of the Ottawa River, flowing into the St. Lawrence via Lake Saint-Louis

Lake Saint-Louis

Lake Saint-Louis, or in French , is a lake in extreme southwestern Quebec, Canada, adjoining the Island of Montreal at the confluence of the Saint Lawrence and Ottawa Rivers.The lake is bounded to the north and east by the Island of Montreal...

, on either side of Île Perrot

Île Perrot

Île Perrot is an island west of the island of Montreal in the Canadian province of Quebec. Part of the Hochelaga Archipelago, the island lies between Lake Saint-Louis and Lac des Deux-Montagnes....

.

The city of Deux-Montagnes

Deux-Montagnes, Quebec

Deux-Montagnes is a municipality in southwestern Quebec, Canada on the north shore of the Rivière des Mille Îles where it flows out of Lake of Two Mountains...

 is located on the lake's north shore, where it flows into Rivière des Mille Îles. The southwest portion of the city of Montréal

Montreal

Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America...

 borders the eastern part of the lake, as does the now de-merged village of Senneville

Senneville, Quebec

Senneville is a village on the western tip of the Island of Montreal. It is the wealthiest town on the West Island, closely followed by Dollard-des-Ormeaux and Baie D'Urfé...

.

Origin of the name

The lake was first named lac des Médicis in 1612 by Samuel de Champlain

Samuel de Champlain

Samuel de Champlain , "The Father of New France", was a French navigator, cartographer, draughtsman, soldier, explorer, geographer, ethnologist, diplomat, and chronicler. He founded New France and Quebec City on July 3, 1608....

, then renamed lac des Soissons about 1632, and ended up bearing its current name around 1684. The name refers to the two highest peaks of Mont Oka, near Oka

Oka, Quebec

-References:...

, that face the lake on its northern shore, Calvaire Mountain and Saint-Joseph-du-Lac Hill.

See also

• List of crossings of the Ottawa River