Civil War veteran John Wesley Wolfe operates a cattle ranch in the area destined to become Arches National Monument/Park.
August 25, 1916
Congress passes the National Park Service Organic Act establishing the National Park Service. Read more: "A Quick History of the National Park Service"
April 12, 1929
President Herbert Hoover signs Presidential Proclamation No. 1875 establishing Arches National Monument.
November 25, 1938
President Franklin D. Roosevelt signs Presidential Proclamation No. 2312 enlarging Arches National Monument.
Significant rock fall occurs at Skyline Arch.
Arches Visitor Center is completed.
September 1, 1991
Significant rock fall from Landscape Arch.
October 30, 1998
President William J. Clinton signs Public Law 105-329 enlarging Arches National Park.