Mount Cairnes is a 3,060-metre (10,039 ft) mountain summit located in the Freshfield Ranges of the Canadian Rockies in British Columbia, Canada.

The mountain was named in 1917 after noted geologist Delorme Donaldson Cairnes (1879-1917) of the Geological Survey of Canada from 1905 through 1917.

[4] There is also another Mount Cairnes named for this same person located in Yukon, where he did much of his work.

Based on the Köppen climate classification, Mount Cairnes is located in a subarctic climate with cold, snowy winters, and mild summers.

[6] Winter temperatures can drop below −20 °C (−4 °F) with wind chill factors below −30 °C (−22 °F).