Mount Crean is one of the westernmost peaks in the dry valley region of South Victoria Land in Antarctica. It lies at , rises to , and is the highest summit in the Lashly Mountains. It is named after the Irish explorer Tom Crean, who was a member of both of Captain Scott's Antarctic expeditions (Discovery, 1901–04 and Terra Nova, 1910–13), and served as second officer on Sir Ernest Shackleton's Imperial Trans-Antarctic Expedition, 1914–17.