Barrier Lake is a man made reservoir at the north end of Kananaskis Country in Alberta, Canada. Highway 40 runs between the lake and Mount Baldy, on the eastern shore. It is entirely located in the Bow Valley Provincial Park. Barrier Lake was created for hydroelectric power generation on the Kananaskis River. The dam that impounds the lake is at the north end of the lake. Barrier Lake was used in the 2003 film X2: X-Men United as the stand in for Alkali Lake and in Heartland (CBC) as Eagle Lake (2011).