Mount Lefroy is a mountain on the Continental Divide, at the border of Alberta and British Columbia in western Canada. The mountain is located on the eastern side of Abbot Passwhich separates Lake Louise in Banff National Park from Lake O’Hara in Yoho National Park. Mount Victoria lies immediately on the western side of the pass.
The mountain was named by George M. Dawson in 1894 for Sir John Henry Lefroy (1817–1890), an astronomer who had traveled over 8,800 kilometres (5,470 mi) in Canada’s north between 1842-44 making meteorological and magnetic observations.
The mountain is the site of the first fatal climbing accident in Canada. In 1896 during a failed summit bid, Phillip S. Abbot slipped on rocks after just coming off an icy section and plummeted down the rock face to his death.