Donald Morton and Lyman Spitzer made the first ascent of Mount Thor in 1965 during the Alpine Club of Canada expedition led by Pat Baird. He also led the 1953 geophysical expedition during which Hans Weber, J. Rothlisberger and F. Schwarzenbach climbed the North Tower of Mount Asgard for the first time. Donald Morton  named the peak in 1963 after an initial attempt to climb it.
 Canadian Alpine Journal 49: 28–42. 1966.
 Canadian Alpine Journal 47: 8–14. 1964.