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Antiquities Act 1906-2006 [link to homepage] Visit the National Monuments [title]

Well over a hundred national monuments across the United States have been established national monuments by many different presidents. Each monument is numbered according to the sequence in which it was established since 1906. Click on a number and learn about the national monument and its history.

El Morro

New Mexico

Action Date President/ Congress Acres Affected
Established 12/08/1906 T. Roosevelt 160
Enlarged 06/18/1917 W. Wilson 240
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Montezuma Castle

Arizona

Action Date President/ Congress Acres Affected
Established 12/08/1906 T. Roosevelt 161.39
Enlarged 02/23/1937 F. Roosevelt 360
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Petrified Forest

Arizona

Action Date President/ Congress Acres Affected
Established 12/08/1906 T. Roosevelt 60,776.02
Diminished 07/31/1911 W. Taft 25,625.60
Enlarged 11/14/1930 H. Hoover 11,010
Redesignated NP 03/28/1958 85th Congress  
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Chaco Canyon

New Mexico

Action Date President/ Congress Acres Affected
Established 03/11/1907 T. Roosevelt 10,643.13
Enlarged 01/10/1928 C. Coolidge 21,509.40
Redesignated Chaco Culture NHP 12/19/1980 96th Congress  
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Gila Cliff Dwellings

New Mexico

Action Date President/ Congress Acres Affected
Established 11/16/1907 T. Roosevelt 160
Enlarged 04/17/1962 J. Kennedy 373.25
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Tonto

Arizona

State Date President/ Congress Acres Affected
Established 12/19/1907 T. Roosevelt 640
Enlarged 04/01/1937 F. Roosevelt 480
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Grand Canyon

Arizona

Action Date President/ Congress Acres Affected
Established 01/11/1908 T. Roosevelt 808,120
Redesignated Grand Canyon NP 02/26/1919 65th Congress  
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Grand Canyon "II"

Arizona

Action Date President/ Congress Acres Affected
Established 12/22/1932 H. Hoover 273,145
Diminished 04/04/1940 F. Roosevelt 71,854
Redesignated Grand Canyon NP 01/03/1975 93d Congress  
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Natural Bridges

Utah

Action Date President/ Congress Acres Affected
Established 04/16/1908 T. Roosevelt 120
Enlarged 09/25/1909 W. Taft 2,620
Boundaries Confirmed 02/11/1916 W. Wilson n/a
Enlarged 08/14/1962 J. Kennedy 5,236
Diminished 320
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Tumacacori

Arizona

Action Date President/ Congress Acres Affected
Established 09/15/1908 T. Roosevelt 10
Enlarged 03/28/1958 D. Eisenhower 0.15
Redesignated NHP 08/06/1990 101st Congress  
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Wheeler

Colorado

Action Date President/ Congress Acres Affected
Established 12/07/1908 T. Roosevelt 300
Transferred to BLM, part of Rio Grande National Forest 08/03/1950 81st Congress  
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Navajo

Arizona

Action Date President/ Congress Acres Affected
Established 03/20/1909 W. Taft 360
Diminished 03/14/1912 W. Taft 320
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Mukuntu-weap/Zion

Utah

Action Date President/ Congress Acres Affected
Established 07/31/1909 W. Taft 16,000
Enlarged & Renamed 03/18/1918 W. Wilson 76,800
Re-designated NP 11/19/1919 66th Congress  
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Zion "II" (Kolob Section)

Utah

Action Date President/ Congress Acres Affected
Established 01/22/1937 F. Roosevelt 49,150
Redesignated NP 07/11/1956 84th Congress  
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Gran Quivira

New Mexico

Action Date President/ Congress Acres Affected
Established 11/01/1909 W. Taft 160
Enlarged 11/25/1919 W. Wilson 240
Transferred to BLM 12/19/1980 96th Congress  
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Rainbow Bridge

Utah

Action Date President/ Congress Acres Affected
Established 05/30/1910 W. Taft 160
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Colorado

Colorado

Action Date President/ Congress Acres Affected
Established 05/24/1911 W. Taft 13,466.21
Diminished 08/07/1959 D. Eisenhower 211
Enlarged 120
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Papago Saguaro

Arizona

Action Date President/ Congress Acres Affected
Established 01/31/1914 W. Wilson 2,050.43
Transferred to AZ, now Papago Park 04/07/1930 71st Congress  
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Dinosaur

Utah - Colorado

Action Date President/ Congress Acres Affected
Established 10/04/1915 W. Wilson 80
Enlarged 07/14/1938 F. Roosevelt 203,885
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Walnut Canyon

Arizona

Action Date President/ Congress Acres Affected
Established 11/30/1915 W. Wilson 960
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Bandelier

New Mexico

Action Date President/ Congress Acres Affected
Established 02/11/1916 W. Wilson 23,352
Enlarged 01/09/1961 D. Eisenhower 3,600
Enlarged 05/27/1963 J. Kennedy 2,882
Diminished 3,925
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Capulin Mountain

New Mexico

Action Date President/ Congress Acres Affected
Established 08/09/1916 W. Wilson 640.42
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Casa Grande

Arizona

Action Date President/ Congress Acres Affected
Established 08/03/1918 W. Wilson 480
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Yucca House

Colorado

Action Date President/ Congress Acres Affected
Established, now administered by Mesa Verde NP 12/19/1919 W. Wilson 9.60
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Timpanogos Cave

Utah

Action Date President/ Congress Acres Affected
Established 10/14/1922 W. Harding 250
Boundaries Confirmed 03/27/1962 J. Kennedy n/a
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Aztec Ruin

New Mexico

Action Date President/ Congress Acres Affected
Established 01/24/1923 W. Harding 4.6
Enlarged 07/02/1928 C. Coolidge 12.6
Enlarged 12/19/1930 H. Hoover 6.8788
Enlarged 05/27/1948 H. Truman 1.255
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Hovenweep

Utah - Colorado

Action Date President/ Congress Acres Affected
Established 03/02/1923 W. Harding 285.80
Enlarged 04/26/1951 H. Truman 80+
Enlarged 11/20/1952 H. Truman 81.02
Diminished 04/06/1956 D. Eisenhower 40
Enlarged, administered by Canyonlands NP 40+
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Pipe Springs

Arizona

Action Date President/ Congress Acres Affected
Established 05/31/1923 W. Harding 40
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Bryce Canyon

Utah

Action Date President/ Congress Acres Affected
Established 06/08/1923 W. Harding 7,440
Redesignated NP 06/07/1924 68th Congress  
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Carlsbad Cave

New Mexico

Action Date President/ Congress Acres Affected
Established 10/25/1923 C. Coolidge 719.22
Redesignated NP 05/14/1930 71st Congress  
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Chiricahua

Arizona

Action Date President/ Congress Acres Affected
Established 04/18/1924 C. Coolidge 3,655.12
Enlarged 06/10/1938 F. Roosevelt 6,407
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Wupatki

Arizona

Action Date President/ Congress Acres Affected
Established 12/09/1924 C. Coolidge 2,234.1
Enlarged 07/09/1937 F. Roosevelt 33,631.2
Diminished 01/22/1941 F. Roosevelt 52.27
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Arches

Utah

Action Date President/ Congress Acres Affected
Established 04/12/1929 H. Hoover 4,520
Enlarged 11/25/1938 F. Roosevelt 29,160
Enlarged 07/22/1960 D. Eisenhower 480
Diminished      
Enlarged 01/20/1969 L. Johnson 48,943
Redesignated NP 11/12/1971 92d Congress  
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Holy Cross

Colorado

Action Date President/ Congress Acres Affected
Established 05/11/1929 H. Hoover 1,392
Redesignated under Forest Service 08/03/1950 81st Congress  
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Sunset Crater

Arizona

Action Date President/ Congress Acres Affected
Established 05/26/1930 H. Hoover 3,040
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Great Sand Dunes

Colorado

Action Date President/ Congress Acres Affected
Established 03/17/1932 H. Hoover 35,528.36
Resurveyed & Modified 03/12/1946 H. Truman n/a
Enlarged 06/07/1956 D. Eisenhower 960
Diminished 9880
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White Sands

New Mexico

Action Date President/ Congress Acres Affected
Established 01/18/1933 H. Hoover 131,486.84
Enlarged 11/28/1934 F. Roosevelt 158.91
Diminis had 08/29/1938 F. Roosevelt (R.O.W.)
Enlarged 06/24/1953 D. Eisenhower 478.53
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Saguaro

Arizona

Action Date President/ Congress Acres Affected
Established 03/01/1933 H. Hoover 53,510.08
Enlarged 11/15/1961 J. Kennedy 15,360
Redesignated NP 10/14/1994 103d Congress  
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Black Canyon of the Gunnison

Colorado

Action Date President/ Congress Acres Affected
Established 03/02/1933 H. Hoover 10,287.95
Enlarged 05/16/1938 F. Roosevelt 100
Enlarged 10/28/1939 F. Roosevelt 2,760
Diminished 04/08/1960 D. Eisenhower 470
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Cedar Breaks

Utah

Action Date President/ Congress Acres Affected
Established 08/22/1933 F. Roosevelt 5,701.39
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Organ Pipe Cactus

Arizona

Action Date President/ Congress Acres Affected
Established 04/13/1937 F. Roosevelt 330,690
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Capitol Reef

Utah

Action Date President/ Congress Acres Affected
Established 08/02/1937 F. Roosevelt 37,060
Enlarged 07/02/1958 D. Eisenhower 3,040
Enlarged 01/20/1969 L. Johnson 215,056
Redesignated NP 12/18/1971 92d Congress  
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Tuzigoot

Arizona

Action Date President/ Congress Acres Affected
Established 07/25/1939 F. Roosevelt 42.67
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Marble Canyon

Arizona

Action Date President/ Congress Acres Affected
Established 01/20/1969 L. Johnson 32,546.69
Incorporated into Grand Canyon NP 01/03/1975 93d Congress  
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Grand Staircase-Escalante

Utah

Action Date President/ Congress Acres Affected
Established (BLM) 09/18/1996 W. Clinton 1,700,000
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Agua Fria

Arizona

Action Date President/ Congress Acres Affected
Established (BLM) 01/11/2000 W. Clinton 71,100
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Grand Canyon-Parashant

Arizona

Action Date President/ Congress Acres Affected
Established 01/11/2000 W. Clinton 1,014,000
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Canyons of the Ancients

Colorado

Action Date President/ Congress Acres Affected
Established (BLM) 06/09/2000 W. Clinton 164,000
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Ironwood Forest

Arizona

Action Date President/ Congress Acres Affected
Established (BLM) 06/09/2000 W. Clinton 128,917
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Vermillion Cliffs

Arizona

Action Date President/ Congress Acres Affected
Established (BLM) 11/09/2000 W. Clinton 293,000
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Kasha-Katuwe Tent Rocks

New Mexico

Action Date President/ Congress Acres Affected
Established (BLM) 01/17/2001 W. Clinton 4,148
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Sonoran Desert

Arizona

Action Date President/ Congress Acres Affected
Established 01/17/2001 W. Clinton 486,149
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