U.S. Forest Service

National forests and grasslands

112 national forests and grasslands, 237 million acres together, from the Forest Service administrative boundary layer. Each page lists the trailheads, picnic areas, cabins and other sites the Forest Service publishes for that forest, and the federal campgrounds inside or within ten miles. The acreage is the agency’s gis_acres figure for the administrative boundary.

Data refreshed September 17, 2026.

The five largest

  1. 1
    Tongass National Forest
    USFS · AK
    18 million acres
  2. 2
    Humboldt-Toiyabe National Forest
    USFS · NV and CA
    6.7 million acres
  3. 3
    Chugach National Forest
    USFS · AK
    6.2 million acres
  4. 4
    Medicine Bow-Routt National Forest
    USFS · WY and CO
    4.6 million acres
  5. 5
    Salmon-Challis National Forest
    USFS · ID
    4.4 million acres

By state

43 states

Alabama1

Alaska2

Arizona6

Arkansas2

California20

Colorado8

Florida1

Georgia2

Idaho10

Illinois2

Indiana1

Kansas1

Kentucky3

Louisiana1

Maine1

Michigan3

Minnesota2

Mississippi1

Missouri1

Montana8

Nebraska1

Nevada3

New Hampshire1

New Mexico6

New York1

North Carolina1

North Dakota1

Ohio1

Oklahoma2

Oregon13

Pennsylvania1

Puerto Rico1

South Carolina2

South Dakota4

Tennessee2

Texas2

Utah6

Vermont1

Virginia1

Washington8

West Virginia2

Wisconsin1

Wyoming8