Cook Peak el. 9,754 feet (2,973 m) is a mountain peak in the Washburn Range of Yellowstone National Park. The peak was named in 1922 by then superintendent Horace Albright to honor of Charles W. Cook, a member of the 1869 Cook–Folsom–Peterson Expedition which explored the Yellowstone park region. 1922 was the 50th anniversary of the park's creation, and Charles Cook, still living in Montana, attended ceremonies in the park.