Lake Tremblant, Lake in Les Laurentides, Quebec, Canada

Lake Tremblant is a long, narrow lake in the Laurentides region of Quebec, wedged between mountainous ridges at the foot of Mont Tremblant. It covers about 9.67 km², stretches 7.6 km, and reaches a maximum depth of 97.4 m. Its shoreline holds about seven islands and five prominent bays, and a dam at its southwestern outlet, built in 1946 and last modified in 2016, controls the water level.

Logging began around Lake Tremblant in the late 19th century, with logs driven down the Devils River and the Rouge River to the Hamilton Brothers mill in Hawkesbury, Ontario. The railroad reached Saint-Jovite in the 1890s and Tremblant village by 1904, shifting local industry from logging to tourism. The first summer cottages appeared around 1905, numbering 33 by 1938, and the log drive ended in the 1940s.

The name comes from Mont Tremblant, the mountain at whose foot the lake lies. From about 1905 summer cottages were built on the shore, reaching 33 by 1938, and the lake drew artists: writer Marie Le Franc set her novel Helier fils des bois here, and painters Michel Normandeau and Edwin Holgate depicted it. The northern shore, in Lac-Tremblant-Nord, keeps a conservationist charter adopted when the municipality was formed in 1915.

The lake is split between the City of Mont-Tremblant in the south and Lac-Tremblant-Nord in the north; the northern shore is a private natural heritage area with few roads and no permanent residents, so access is by water. A dam at the south-west outlet, built in 1946 and last modified in 2016, controls the water level. The lake receives most of its inflow from the Rivière Cachée to the north.

Lake Tremblant holds seven islands and five prominent bays, and its fish include smallmouth and largemouth bass, muskellunge, landlocked salmon and lake trout. The lake also inspired French writer Marie Le Franc's novel Helier fils des bois and paintings by Michel Normandeau and Edwin Holgate.