 He also received a Ph.D. in English from the University of Denver in 1970.In thirteen seasons spent in the Alaskan wilderness, Roberts is well known for many first ascents, including the Wickersham Wall on Mount McKinley, the West rib of Mount Huntington, climbing in the Western Brooks Range and the Kichatna Spires, and on the East Face of Mount Dickey.Roberts also named Alaska's Revelation Mountains, giving many of the peaks Biblical names because he had been reading the Bible as part of his English literature studies at the time.