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. 1940
Significant rock fall occurs at Skyline Arch. 1959
Visitor Center at Arches National Park completed.
July 22, 1960
President Dwight D. Eisenhower signs Presidential Proclamation No. 3360 adjusting the boundaries of Arches National Monument.
January 20, 1969
President Lyndon B. Johnson signs Presidential Proclamation No. 3887 enlarging Arches National Monument. November 12, 1971
President Richard M. Nixon signs Public Law 92-155 changing Arches from a National Monument to a National Park.
1975
Wolfe Ranch listed on National Register of Historic Places. Winter of 1975/1976
Chip Off the Old Block" falls near Balanced Rock.
1979
50th Anniversary of Arches National Monument/Park celebrated. 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.
February 4, 2002
Winter Olympic torch carried through Arches.
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