Asperity Mountain is a mountain located in British Columbia, Canada, rising to 3,716 metres (12,192 ft). It is located between Tellot and Tiedemann Glaciers on the north and south respectively, in the Waddington Range, a subrange of the Pacific Ranges. The gorge of the Homathko River runs north to south on the east side of the mountain, carrying runoff from the mountain and glaciers to the Pacific Ocean.