Mount Tiedemann, Mountain summit in Coast Mountains, Canada

Mount Tiedemann is a 3,838 m (12,592 ft) summit in the Waddington Range of the Pacific Ranges, Coast Mountains, British Columbia, with 848 m of prominence. It lies 3 km northeast of Mount Waddington, between the Homathko and Klinaklini Rivers, and is surrounded by the Chaos, Radiant and Tiedemann glaciers.

The first ascent was made in 1939 by Sterling Hendricks, Hans Fuhrer, E.R. Gibson and Henry S. Hall, who climbed the Chaos Glacier to the North Arête. The peak bears the name of Herman Otto Tiedemann, the architect and surveyor who in 1862 accompanied Alfred Waddington on preliminary surveys for a wagon road to the Cariboo goldfields via Bute Inlet and the Homathko River, a project abandoned with the outbreak of the Chilcotin War in 1864.

Mount Tiedemann honours Herman Otto Tiedemann, who designed Victoria's original legislature buildings, nicknamed the "Birdcages", as well as the Fisgard Lighthouse and the former courthouse now housing the Maritime Museum. He also brought Elk Lake water to Victoria as its first supply and in 1862 surveyed a proposed wagon road to the Cariboo goldfields with Alfred Waddington.

Climbing this peak demands technical mountaineering skills and experience navigating glaciated terrain, particularly the Chaos Glacier. Weather conditions can be severe with temperatures dropping well below freezing, so proper equipment and winter mountaineering experience are essential.

The peak sits between the Homathko and Klinaklini Rivers, surrounded by three distinct glaciers named Chaos, Radiant, and Tiedemann. This arrangement creates one of the most complex glacial landscapes in the region.