For other uses of Three Sisters, see Three Sisters (disambiguation).

Three Sisters are a trio of peaks near Canmore, Alberta. They are known individually as Big Sister, Middle Sister and Little Sister. The trio was originally named the The Three Nuns by George Mercer Dawson in 1886, who later changed it to its current name.

The Big Sister is a moderate scramble on southwestern slopes while the Middle Sister is an easy scramble from Stewart Creek . The Little Sister is a more difficult ascent requiring technical climbing skills.