Park History
•Proclaimed national monument: March 1, 1933.

•Transferred from USFS to USDA: Aug. 10, 1933.

•Boundary changes: Nov. 15, 1961; Oct. 21, 1976; June 19, 1991; Oct. 4, 1994.

•Designated Wilderness Area: Oct. 20, 1976.

•Established as a national park: Oct. 4, 1994.