National Monuments, National Conservation Areas, and Similar Designations Detail Table

The tables below identify individual National Monuments, National Conservation Areas, and similar designations in each State. For State-level summary information visit the National Monuments, National Conservation Areas, and similar designations Summary Table.

National Monuments, National Conservation Areas, and similar designations are designated by Congress or through Presidential Proclamations. Links to these statutes or Proclamations can be found on unit-specific pages.

Alaska

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Steese	National Conservation Area	Eastern Interior Field Office	Public Law 96-487	12/2/1980	1,208,624	1,208,624

Arizona

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Agua Fria	National Monument	Hassayampa Field Office	Proclamation 7263	1/11/2000	70,980	70,980
Baaj Nwaavjo I’tah Kukveni—Ancestral Footprints of the Grand Canyon	National Monument	Arizona Strip District Office	Proclamation 10606	8/8/2023	529,242	917,618
Gila Box Riparian	National Conservation Area	Safford Field Office	Public Law 101-628	11/28/1990	21,767	21,767
Grand Canyon-Parashant	National Monument	Arizona Strip District Office	Proclamation 7265	1/11/2000	812,581	1,021,030
Ironwood Forest	National Monument	Tucson Field Office	Proclamation 7320	6/9/2000	128,756	129,055
Las Cienegas	National Conservation Area	Tucson Field Office	Public Law 106-538	12/6/2000	41,972	41,972
San Pedro Riparian	National Conservation Area	Tucson Field Office	Public Law 100-696	11/18/1988	56,431	56,431
Sonoran Desert	National Monument	Lower Sonoran Field Office	Proclamation 7397	1/17/2001	486,400	486,400
Vermilion Cliffs	National Monument	Arizona Strip Field Office	Proclamation 7374	11/9/2000	279,566	279,566

California

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Alabama Hills	National Scenic Area	Bishop Field Office	Public Law 116-9	3/12/2019	18,610	18,610
Berryessa Snow Mountain	National Monument	Ukiah Field Office	Proclamation 9298*	7/10/2015	147,262	344,476
California Coastal	National Monument	Central California District Office	Proclamation 7264*	1/11/2000	8,858	8,858
Carrizo Plain	National Monument	Bakersfield Field Office	Proclamation 7393	1/17/2001	211,045	211,045
Cascade-Siskiyou**	National Monument	Ashland Field Office	Proclamation 7318*	6/9/2000	5,340 in CA 112,928 total	5,340 in CA 112,928 total
Chuckwalla	National Monument	Palm Springs-South Coast Field Office	Proclamation 10881	1/14/2025	624,270	624,270
Fort Ord	National Monument	Central Coast Field Office	Proclamation 8803	4/20/2012	7,212	14,658
Headwaters	Forest Reserve	Arcata Field Office	Public Law 105-83	3/1/1999	7,472	7,472
King Range	National Conservation Area	Arcata Field Office	Public Law 91-476	10/21/1970	62,562	62,562
Mojave Trails	National Monument	Needles Field Office	Proclamation 9395	2/12/2016	1,600,000	1,600,000
Piedras Blancas Historic Light Station	Outstanding Natural Area	Bakersfield Field Office	Public Law 110-229	5/8/2008	20	20
Sand to Snow	National Monument	Springs-South Coast Field Office	Proclamation 9396	2/12/2016	83,000	154,000
Santa Rosa and San Jacinto Mountains	National Monument	Palm Springs-South Coast Field Office	Public Law 106-351*	10/24/2000	98,981	169,096

Colorado

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Browns Canyon	National Monument	Royal Gorge Field Office	Proclamation 9232	2/19/2015	9,793	21,604
Canyons of the Ancients	National Monument	Tres Rios Field Office	Proclamation 7317	6/9/2000	176,000	176,370
Dominguez-Escalante	National Conservation Area	Grand Junction Field Office	Public Law 111-11	3/30/2009	210,149	210,149
Gunnison Gorge	National Conservation Area	Uncompahgre Field Office	Public Law 106-76	10/21/1999	63,201	63,201
McInnis Canyons**	National Conservation Area	Grand Junction Field Office	Public Law 106-353	10/24/2000	118,340 in CO 123,460 total	118, 365 in CO 123,485 total

Eastern States (Florida)

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Jupiter Inlet Lighthouse	Outstanding Natural Area	Southeastern States District Office	Public Law 110-229	5/8/2008	86	107

Idaho

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Craters of the Moon	National Monument	Shoshone Field Office	Proclamation 7373	11/9/2000	275,076	738,420
Morley Nelson Snake River Birds of Prey	National Conservation Area	Four Rivers Field Office	Public Law 103-64	8/4/1993	483,700	485,300

Montana

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Pompeys Pillar	National Monument	Billings Field Office	Proclamation 7396	1/17/2001	51	51
Upper Missouri River Breaks	National Monument	Lewistown Field Office	Proclamation 7398	1/17/2001	377,346	377,346

Nevada

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Avi Kwa Ame	National Monument	Las Vegas Field Office	Proclamation 10533	3/21/2023	442,832	506,733
Basin and Range	National Monument	Ely District Office	Proclamation 9297	7/10/2015	703,585	703,585
Black Rock Desert-High Rock Canyon Emigrant Trails	National Conservation Area	Black Rock Field Office	Public Law 106-554	12/21/2000	799,485	799,485
Gold Butte	National Monument	Las Vegas Field Office	Proclamation 9559	12/28/2016	296,937	296,937
Numunaa Nobe	National Conservation Area	Carson City District Office	Public Law 117-263	12/23/2022	160,224	160,224
Pistone-Black Mountain	National Conservation Area	Stillwater Field Office	Public Law 117-263	12/23/2022	3,415	3,415
Red Rock Canyon	National Conservation Area	Red Rock/Sloan Field Office	Public Law 101-621	11/16/1990	196,877	196,877
Sloan Canyon	National Conservation Area	Red Rock/Sloan Field Office	Public Law 107-282	11/6/2002	48,438	48,438

New Mexico

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
El Malpais	National Conservation Area	Rio Puerco Field Office	Public Law 100-225	12/31/1987	227,100	227,100
Fort Stanton-Snowy River Cave	National Conservation Area	Roswell Field Office	Public Law 111-11	3/30/2009	24,876	24,876
Kasha-Katuwe Tent Rocks	National Monument	Rio Puerco Field Office	Proclamation 7394	1/17/2001	4,647	4,647
Organ Mountains-Desert Peaks	National Monument	Las Cruces District Office	Proclamation 9131	5/21/2014	496,529	496,529
Prehistoric Trackways	National Monument	Las Cruces District Office	Public Law 111-11	3/30/2009	5,280	5,280
Rio Grande del Norte	National Monument	Taos Field Office	Proclamation 8946	3/25/2013	242,710	242,710

Oregon

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Cascade-Siskiyou**	National Monument	Ashland Field Office	Proclamation 7318*	6/9/2000	107,466 in OR 112,928 total	107,466 in OR 112,928 total
Steens Mountain	Cooperative Management and Protection Area	Andrews Field Office	Public Law 106-399	10/30/2000	428,440	428,440
Yaquina Head	Outstanding Natural Area	Mary's Peak Field Office	Public Law 96-199	3/5/1980	95	100

Utah

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
Bears Ears	Canyon Country	Monticello Field Office	Proclamation 9558*	12/28/2016	1,074,908	1,363,948
Beaver Dam Wash	National Conservation Area	St. George Field Office	Public Law 111-11	3/30/2009	63,478	63,478
Grand Staircase-Escalante	National Monument	Paria River District Office	Proclamation 6920*	9/19/1996	1,870,000	1,870,000
John Wesley Powell	National Conservation Area	Vernal Field Office	Public Law 116-9	3/12/2019	29,868	29,868
Jurassic	National Monument	Price Field Office	Public Law 116-9	3/12/2019	850	850
McInnis Canyons**	National Conservation Area	Grand Junction Field Office	Public Law 106-353	10/24/2000	5,120 in UT 123,460 total	5,120 in UT 123,485 total
Red Cliffs	National Conservation Area	St. George Field Office	Public Law 111-11	3/30/2009	44,859	44,859

Washington

Unit name	Unit type	Managing Office	Initial Public Law or Proclamation	Date of Initial Designation	BLM Acres	Total Unit Acres (Federal lands only)
San Juan Islands	National Monument	Spokane District Office	Proclamation 8947	3/25/2013	970	970

* Indicates multiple Public Laws or Presidential Proclamations have either defined the purpose of the designation or expanded or contracted the area designated. Visit the individual unit web page for more information.

** Cascade-Siskiyou NM is located in both Oregon and California. McInnis Canyons NCA is located in both Colorado and Utah.

Unit data as of January 2026. Data are generalized for informal use, conditions on the ground may differ. State, Indian Tribe, and private land (inholdings) are not part of these units.