Mount La Perouse is a 10,728-foot glaciated mountain summit located in the Fairweather Range of the Saint Elias Mountains, in southeast Alaska, United States. The peak is situated in Glacier Bay National Park, 4 mi southeast of Mount Dagelet, 7.6 mi south-southeast of Mount Crillon which is the nearest higher peak, and 28.6 mi southeast of Mount Fairweather, which is the highest peak in the Fairweather Range.