Mount Crillon is a high peak of the Fairweather Range, the southernmost part of the Saint Elias Mountains. It lies southeast of Mount Fairweather, in the promontory between the Gulf of Alaska and Glacier Bay. It is included in Glacier Bay National Park. The peak was named after Felix-Francois-Dorothee de Bretton, Comte de Crillon, by his friend, the French explorer Jean Francois de Galaup de la Perouse.