Fritiof M. Fryxell (April 27, 1900 – December 19, 1986) was an American educator, geologist and mountain climber, best known for his research and writing on the Teton Range of Wyoming. Upon the establishment of Grand Teton National Park in 1929, he was named the park’s first naturalist, a position he held for six summers. He was also an accomplished biographer, publishing works on several artists and explorers of the American West.