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The Crowsnest River is a tributary to the Oldman River in southern Alberta, Canada. It meanders through the Crowsnest Pass and Frank Slide. The Crowsnest River is a highly productive river with a substantial insect population that fuels a world-class sport fishery for rainbow trout, cutthroat trout, bull trout, hybrid trout ("cutbow" cutthroat & rainbow trout crosses), brown trout (below Lundbreck Falls), mountain whitefish, and various species of suckers.
Beginning high in the Rocky Mountains the river flows out onto the rolling plains of Alberta where it joins the Oldman River Reservoir, a result of the Oldman Dam Project.
Coordinates: 49°35′59″N 114°02′57″W / 49.59972°N 114.04917°W