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	EPA Home > Visibility Monitoring > List of 156 Mandatory Class I Federal Areas

List of 156 Mandatory Class I Federal Areas

Area Name	Acreage	Federal Land Manager	Public Law
81.401 Alabama
Sipsey Wilderness Area	12,646	USDA-FS	93-622
81.402 Alaska
Bering Sea Wilderness Area	41,113	USDI-FWS	91-622
Denali NP (formerly Mt. McKinley NP)	1,949,493	USDI-FWS	64-353
Simeonof Wilderness Area	25,141	USDI-FWS	94-557
Tuxedni Wilderness Area	6,402	USDI-FWS	91-504
81.403 Arizona
Chiricahua National Monument Wilderness Area.	9,440	USDI-NPS	94-567
Chiricahua Wilderness Area	18,000	USDA-FS	88-577
Galiuro Wilderness Area	52,717	USDA-FS	88-577
Grand Canyon NP	1,176,913	USDI-NPS	65-277
Mazatzal Wilderness Area	205,137	USDA-FS	88-577
Mount Baldy Wilderness Area	6,975	USDA-FS	91-504
Petrified Forest NP	93,493	USDI-NPS	85-358
Pine Mountain Wilderness Area	20,061	USDA-FS	92-230
Saguaro Wilderness Area	71,400	USDI-FS	94-567
Sierra Ancha Wilderness Area	20,850	USDA-FS	88-577
Superstition Wilderness Area	124,117	USDA-FS	88-577
Sycamore Canyon Wilderness Area	47,757	USDA-FS	92-241
81.404 Arkansas
Caney Creek Wilderness Area	4,344	USDA-FS	93-622
Upper Buffalo Wilderness Area	9,912	USDA-FS	93-622
81.405 California
Agua Tibia Wilderness Area	15,934	USDA-FS	93-632
Caribou Wilderness Area	19,080	USDA-FS	88-577
Cucamonga Wilderness Area	9,022	USDA-FS	88-577
Desolation Wilderness Area	63,469	USDA-FS	91-82
Dome Land Wilderness Area	62,206	USDA-FS	88-577
Emigrant Wilderness Area	104,311	USDA-FS	93-632
Hoover Wilderness Area	47,916	USDA-FS	88-577
John Muir Wilderness Area	484,673	USDA-FS	8-577
Joshua Tree Wilderness Area	429,690	USDI-NPS	94-567
Kaiser Wilderness Area	22,500	USDA-FS	94-577
Kings Canyon NP	459,994	USDI-NPS	76-424
Lassen Volcanic NP	105,800	USDI-NPS	64-184
Lava Beds Wilderness Area	28,640	USDI-NPS	92-493
Marble Mountain Wilderness Area	213,743	USDA-FS	88-577
Minarets Wilderness Area	109,484	USDA-FS	88-577
Mokelumme Wilderness Area	50,400	USDA-FS	88-577
Pinnacles Wilderness Area	12,952	USDI-NPS	94-567
Point Reyes Wilderness Area	25,370	USDI-NPS	94-544
Redwood NP	27,792	USDI-NPS	90-545
San Gabriel Wilderness Area	36,137	USDA-FS	90-318
San Gorgonio Wilderness Area	34,644	USDA-FS	88-577
San Jacinto Wilderness Area	20,564	USDA-FS	88-577
San Rafael Wilderness Area	142,722	USDA-FS	90-271
Sequoia NP	386,642	USDI-NS	({1})
South Warner Wilderness Area	68,507	USDA-FS	88-577
Thousand Lakes Wilderness Area	15,695	USDA-FS	88-577
Ventana Wilderness Area	95,152	USDA-FS	91-58
Yolla-Bolly-Middle-Eel Wilderness Area	109,091	USDA-FS	88-577
Yosemite NP	759,172	USDI-NPS	58-49
81.406 Colorado
Black Canyon of the Gunnison Wilderness Area	11,180	USDI-NPS	94-567
Eagles Nest Wilderness Area	133,910	USDA-FS	94-352
Flat Tops Wilderness Area	235,230	USDA-FS	94-146
Great Sand Dunes Wilderness Area	33,450	USDI-NPS	94-567
La Garita Wilderness Area	48,486	USDA-FS	88-577
Maroon Bells-Snowmass Wilderness Area	71,060	USDA-FS	88-577
Mesa Verde NP	51,488	USDI-NPS	59-353
Mount Zirkel Wilderness Area	72,472	USDA-FS	88-577
Rawah Wilderness Area	26,674	USDA-FS	88-577
Rocky Mountain NP	263,138	USDI-NPS	63-238
Weminuche Wilderness Area	400,907	USDA-FS	93-632
West Elk Wilderness Area	61,412	USDA-FS	88-577
81.407 Florida
Chassahowitzka Wilderness Area	23,360	USDI-FWS	94-557
Everglades NP	1,397,429	USDI-NPS	73-267
St. Marks Wilderness Area	17,745	USDI-FWS	93-632
81.408 Georgia
Cohotta Wilderness Area	33,776	USDA-FS	93-622
Okefenokee Wilderness Area	343,850	USDI-FWS	93-429
Wolf Island Wilderness Area	5,126	USDI-FWS	93-632
81.409 Hawaii
Haleakala NP	27,208
Hawaii Volcanoes NP	217,029
81.41 Idaho
Craters of the Moon Wilderness Area	43,243	USDI-NPS	91-504
Hells Canyon Wilderness Area{1}	83,800	USDA-FS	94-199
Sawtooth Wilderness Area	216,383	USDA-FS	92-400
Selway-Bitterroot Wilderness Area{2}	988,770	USDA-FS	88-577
Yellowstone NP{3}	31,488	USDI-NPS	({4})
{1} Hells Canyon Wilderness, 192,700 acres overall, of which 108,900 acres are in Oregon and 83,800 acres are in Idaho. {2} Selway Bitterroot Wilderness, 1,240,700 acres overall, of which 988,700 acres are in Idaho and 251,930 acres are in Montana. {3} Yellowstone National Park, 2,219,737 acres overall, of which 2,020,625 acres are in Wyoming, 167,624 acres are in Montana, and 31,488 acres are in Idaho {4} 17 Stat. 32 (42nd Cong.).
81.411 Kentucky
Mammoth Cave NP	51,303	USDI-NPS	69-283
81.412 Louisiana
Breton Wilderness Area	5,000+	USDI-FWS	93-632
81.413 Maine
Acadia National Park	37,503	USDI-NPS	65-278
Moosehorn Wilderness Area	7,501	USDI-FWS
(EDMUNDS UNIT)	(2,782)		91-504
(Baring Unit)	(4,719)		93-632
81.414 Michigan
Isle Royale NP	542,428	USDI-NPS	71-835
Seney Wilderness Area	25,150	USDI-FWS	91-504
81.415 Minnesota
Boundary Waters Canoe Area Wilderness Area	747,840	USDA-FS	99-577
Voyageurs NP	114,964	USDI-NPS	99-261
81.416 Missouri
Hercules-Glades Wilderness Area	12,315	USDA-FS	94-557
Mingo Wilderness Area	8,000	USDI-FWS	95-557
81.417 Montana
Anaconda-Pintlar Wilderness Area	157,803	USDA-FS	88-577
Bob Marshall Wilderness Area	950,000	USDA-FS	88-577
Cabinet Mountains Wilderness Area	94,272	USDA-FS	88-577
Gates of the Mtn Wilderness Area	28,562	USDA-FS	88-577
Glacier NP	1,012,599	USDI-NPS	61-171
Medicine Lake Wilderness Area	11,366	USDI-FWS	94-557
Mission Mountain Wilderness Area	73,877	USDA-FS	93-632
Red Rock Lakes Wilderness Area	32,350	USDI-FWS	94-557
Scapegoat Wilderness Area	239,295	USDA-FS	92-395
Selway-Bitterroot Wilderness Area{1}	251,930	USDA-FS	88-577
U. L. Bend Wilderness Area	20,890	USDI-FWS	94-557
Yellowstone NP{2}	167,624	USDI-NPS	({3})
{1} Selway-Bitterroot Wilderness, 1,240,700 acres overall, of which 988,770 acres are in Idaho and 251,930 acres are in Montana. {2} Yellowstone National Park, 2,219,737 acres overall, of which 2,020,625 acres are in Wyoming, 167,624 acres are in Montana, and 31,488 acres are in Idaho. {3} 17 Stat. 32 (42nd Cong.) [44 FR 69124, Nov. 30, 1979; 45 FR 6103, Jan. 25, 1980]
81.418 Nevada
Jarbidge Wilderness Area	64,667	USDA-FS	88-577
81.418 New Hampshire
Great Gulf Wilderness Area	5,552	USDA-FS	88-577
Presidential Range-Dry River Wilderness Area	20,000	USDA-FS	93-622
81.42 New Jersey
Brigantine Wilderness Area	6,603	USDI-FWS	93-632
81.421 New Mexico
Bandelier Wilderness Area	23,267	USDI-NPS	94-567
Bosque del Apache Wilderness Area	80,850	USDI-FWS	93-632
Carlsbad Caverns NP	46,435	USDI-NPS	71-216
Gila Wilderness Area	433,690	USDA-FS	88-577
Pecos Wilderness Area	167,416	USDA-FS	88-577
Salt Creek Wilderness Area	8,500	USDI-FWS	91-504
San Pedro Parks Wilderness Area	41,132	USDA-FS	88-577
Wheeler Peak Wilderness Area	6,027	USDA-FS	88-577
White Mountain Wilderness Area	31,171	USDA-FS	88-577
81.422 North Carolina
Great Smoky Mountains NP{1}	273,551	USDI-NPS	69-268
Joyce Kilmer-Slickrock Wilderness Area{2}	10,201	USDA-FS	93-622
Linville Gorge Wilderness Area	7,575	USDA-FS	88-577
Shining Rock Wilderness Area	13,350	USDA-FS	88-577
Swanquarter Wilderness Area	9,000	USDI-FWS	94-557
{1}Great Smoky Mountains National Park, 514,758 acres overall, of which 273,551 acres are in North Carolina, and 241,207 acres are in Tennessee. {2}Joyce Kilmer-Slickrock Wilderness, 14,033 acres overall, of which 10,201 acres are in North Carolina, and 3,832 acres are in Tennessee.
81.423 North Dakota
Lostwood Wilderness	5,557	USDI-FWS	93-632
Theodore Roosevelt NP	69,675	USDI-NPS	80-38
81.424 Oklahoma
Wichita Mountains Wilderness	8,900	USDI-FWS	91-504
81.425 Oregon
Crater Lake NP	160,290	USDA-NPS	57-121
Diamond Peak Wilderness	36,637	USDA-FS	88-577
Eagle Cap Wilderness	293,476	USDA-FS	88-577
Gearhart Mountain Wilderness	18,709	USDA-FS	88-577
Hells Canyon Wilderness{1}	108,900	USDA-FS	94-199
Kalmiopsis Wilderness	76,900	USDA-FS	88-577
Mountain Lakes Wilderness	23,071	USDA-FS	88-577
Mount Hood Wilderness	14,160	USDA-FS	88-577
Mount Jefferson Wilderness	100,208	USDA-FS	90-548
Mount Washington Wilderness	46,116	USDA-FS	88-577
Strawberry Mountain Wilderness	33,003	USDA-FS	88-577
Three Sisters Wilderness	199,902	USDA-FS	88-577
{10} Hells Canyon Wilderness, 192,700 acres overall, of which 108,900 acres are in Oregon, and 83,800 acres are in Idaho.
81.426 South Carolina
Cape Romain Wilderness	28,000	USDI-FWS	93-632
81.427 South Dakota
Badlands Wilderness	64,250	USDI-NPS	94-567
Wind Cave NP	28,060	USDI-NPS	57-16
81.428 Tennessee
Great Smoky Mountains NP{1}	241,207	USDI-NPS	69-268
Joyce Kilmer-Slickrock Wilderness{2}	3,832	USDA-FS	93-622
{1} Great Smoky Mountains National Park, 514,758 acres overall, of which 273,551 acres are in North Carolina, and 241,207 acres are in Tennessee. {2} Joyce Kilmer Slickrock Wilderness, 14,033 acres overall, of which 10,201 acres are in North Carolina, and 3,832 acres are in Tennessee. [44 FR 69124, Nov. 30, 1979; 45 FR 6103, Jan. 25, 1980]
81.429 Texas
Big Bend NP	708,118	USDI-NPS	74-157
Guadalupe Mountains NP	76,292	USDI-NPS	89-667
81.43 Utah
Arches NP	65,098	USDI-NPS	92-155
Bryce Canyon NP	35,832	USDI-NPS	68-277
Canyonlands NP	337,570	USDI-NPS	88-590
Capitol Reef NP	221,896	USDI-NPS	92-507
Capitol Reef NP	221,896	USDI-NPS	92-507
Zion NP	142,462	USDI-NPS	68-83
81.431 Vermont
Lye Brook Wilderness	12,430	USDA-FS	93-622
81.432 Virgin Islands
Virgin Islands NP	12,295	USDI-NPS	84-925
81.433 Virginia
James River Face Wilderness	8,703	USDA-FS	93-622
Shenandoah NP	190,535	USDI-NPS	69-268
81.434 Washington
Alpine Lakes Wilderness	303,508	USDA-FS	94-357
Glacier Peak Wilderness	464,258	USDA-FS	88-577
Goat Rocks Wilderness	82,680	USDA-FS	88-577
Mount Adams Wilderness	32,356	USDA-FS	88-577
Mount Rainer NP	235,239	USDI-NPS	({1})
North Cascades NP	503,277	USDI-NPS	90-554
Olympic NP	892,578	USDI-NPS	75-778
Pasayten Wilderness	505,524	USDA-FS	90-544
{1} 30 Stat. 993 (55th Cong.).
81.435 West Virginia
Dolly Sods Wilderness	10,215	USDA-FS	93-622
Otter Creek Wilderness	20,000	USDA-FS	93-622
81.436 Wyoming
Bridger Wilderness	392,160	USDA-FS	88-577
Fitzpatrick Wilderness	191,103	USDA-FS	94-567
Grand Teton NP	305,504	USDI-NPS	81-787
North Absaroka Wilderness	351,104	USDA-FS	88-577
Teton Wilderness	557,311	USDA-FS	88-577
Washakie Wilderness	686,584	USDA-FS	92-476
Yellowstone NP{1}	2,020,625	USDI-NPS	({2})
{1} Yellowstone National Park, 2,219,737 acres overall, of which 2,020,625 acres are in Wyoming, 167,624 acres are in Montana, and 31,488 acres are in Idaho. {2} 17 Stat. 32 (42nd Cong.).
81.437 New Brunswick, Canada
Roosevelt Campobello International Park	2,721	({1})	88-363
{1} Chairman, RCIP Commission.
All references are to Part 51 of the Code of Federal Regulations Abbreviations:* USDI-NPS: U.S. Department of Interior, National Park Service USDA-FS: U.S. Department of Agriculture, U.S. Forest Service USDI-FWS: U.S. Department of Interior, Fish and Wildlife Service

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