[4] Precipitation runoff from the tower drains to Onion Creek which empties into the Colorado River, approximately three miles to the west.

[4] This landform's descriptive toponym refers to the summit rock resembling the tail of a Cottontail rabbit.

[5] Cottontail Tower is briefly shown (as a parachute flies by) in the opening scene of the film Austin Powers in Goldmember.

[6] The first ascent of the summit was made June 11, 1967, by Harvey T. Carter, Art Howells, Mike Dudley, Don Doucette, Morgan Gadd, and Herbie Hendricks via the class 5.9 West Side Story route on the northwest side of the tower.

This desert climate receives less than 10 inches (250 millimeters) of annual rainfall, and snowfall is generally light during the winter.