A national grassland is an area of protected and managed federal lands in the United States authorized by Title III of the Bankhead–Jones Farm Tenant Act of 1937 and managed by the United States Forest Service. For administrative purposes, they are essentially identical to national forests, except that grasslands are areas primarily consisting of prairie. Like national forests, national grasslands may be open for hunting, grazing, mineral extraction, recreation and other uses. Various national grasslands are typically administered in conjunction with nearby national forests.

All but four national grasslands are on or at the edge of the Great Plains. Those four are in southeastern Idaho, northeastern California, central Oregon, and a reserve in Illinois. The three national grasslands in North Dakota, together with one in northwestern South Dakota, are administered jointly as the Dakota Prairie Grasslands. National grasslands are generally much smaller than national forests – while a typical national forest would be about 1,000,000 acres (400,000 ha), the average size of a national grassland is 191,914 acres (77,665 ha). The largest, the Little Missouri National Grassland in North Dakota, covers 1,028,784 acres (416,334 ha), which is approximately the median size of a national forest. As of September 30, 2007, the total area of all 20 national grasslands was 3,838,280 acres (1,553,300 ha).^[1]

Soil Conservation Service

The catastrophic Dust Bowl of the 1930s led to the creation of the Soil Conservation Service in 1933. This and subsequent federal laws paved the way for establishing national grasslands.

List

Name	Photo	Location[2]	Administered by	Area[1]	Description
Black Kettle		Oklahoma, Texas 35°41′01″N 99°45′47″W / 35.68361°N 99.76306°W / 35.68361; -99.76306 (Black Kettle)	Cibola National Forest	31,286 acres (126.6 km2)	Black Kettle has sandy red slate hills as well as grassland and oak brush. There are three developed recreation areas, and the Washita River flows through the grassland.
Buffalo Gap		South Dakota 43°26′15″N 103°03′02″W / 43.43750°N 103.05056°W / 43.43750; -103.05056 (Buffalo Gap)	Nebraska National Forests	595,715 acres (2,410.8 km2)	There are mixed prairie and badlands in Buffalo Gap as well as a reintroduced population of black-footed ferrets.
Butte Valley		California 41°53′57″N 122°01′31″W / 41.89917°N 122.02528°W / 41.89917; -122.02528 (Butte Valley)	Klamath National Forest	18,425 acres (74.6 km2)	Formed July 1991, Butte Valley is the most recent National Grassland. It contains Meiss Lake and views of the Cascade Range.
Caddo		Texas 33°43′56″N 95°57′29″W / 33.73222°N 95.95806°W / 33.73222; -95.95806 (Caddo)	National Forests and Grasslands in Texas	17,873 acres (72.3 km2)	Caddo is divided into two units and has two developed recreation areas around Lake Davy Crockett.
Cedar River		North Dakota 45°57′19″N 101°48′24″W / 45.95528°N 101.80667°W / 45.95528; -101.80667 (Cedar River)	Dakota Prairie Grasslands	6,717 acres (27.2 km2)	Cedar River is within the Standing Rock Indian Reservation and has rolling hills and ephemeral streams.
Cimarron		Kansas 37°08′18″N 101°46′56″W / 37.13833°N 101.78222°W / 37.13833; -101.78222 (Cimarron)	Pike & San Isabel National Forests	108,176 acres (437.8 km2)	Cimarron has shortgrass prairie with cottonwood groves along the Cimarron River.
Comanche		Colorado 37°20′12″N 103°04′26″W / 37.33667°N 103.07389°W / 37.33667; -103.07389 (Comanche)	Pike & San Isabel National Forests	443,081 acres (1,793.1 km2)	There are not only prairies in Comanche, but also canyons, including Picture Canyon.
Crooked River		Oregon 44°32′36″N 121°06′34″W / 44.54333°N 121.10944°W / 44.54333; -121.10944 (Crooked River)	Deschutes & Ochoco National Forests	112,357 acres (454.7 km2)	Crooked River contains two National Wild and Scenic Rivers: the Deschutes and Crooked rivers.
Curlew		Idaho 42°11′15″N 112°41′57″W / 42.18750°N 112.69917°W / 42.18750; -112.69917 (Curlew)	Caribou-Targhee National Forest	47,790 acres (193.4 km2)	In southern Idaho, Curlew provides habitat for sage grouse while the Sweeten Pond area supports waterfowl and shorebirds.
Fort Pierre		South Dakota 44°08′27″N 100°16′45″W / 44.14083°N 100.27917°W / 44.14083; -100.27917 (Fort Pierre)	Nebraska National Forests	115,890 acres (469.0 km2)	Located south of Pierre and Fort Pierre, South Dakota, The Fort Pierre grassland includes several ponds open to fishing and dispersed camping.
Grand River		South Dakota 45°44′09″N 102°21′40″W / 45.73583°N 102.36111°W / 45.73583; -102.36111 (Grand River)	Dakota Prairie Grasslands	154,783 acres (626.4 km2)	In addition to prairie, there are a variety of habitats in Grand River, including sand dunes, river bottoms, badlands, buttes, and sandstone outcroppings.
Kiowa		New Mexico 36°10′00″N 104°10′02″W / 36.16667°N 104.16722°W / 36.16667; -104.16722 (Kiowa)	Cibola National Forest	137,131 acres (554.9 km2)	Kiowa consists of two units in northeastern New Mexico and includes canyons along the Canadian River.
Little Missouri		North Dakota 47°05′55″N 103°32′14″W / 47.09861°N 103.53722°W / 47.09861; -103.53722 (Little Missouri)	Dakota Prairie Grasslands	1,028,784 acres (4,163.3 km2)	The largest National Grassland, Little Missouri includes badlands and short and long grass prairie.
Lyndon B. Johnson		Texas 33°20′56″N 97°39′32″W / 33.34889°N 97.65889°W / 33.34889; -97.65889 (NAME)	National Forests and Grasslands in Texas	20,309 acres (82.2 km2)	Used primarily for recreation, Lyndon B. Johnson National Grassland has no fees and is located northwest of Fort Worth.
McClellan Creek		Texas 35°12′42″N 100°52′16″W / 35.21167°N 100.87111°W / 35.21167; -100.87111 (McClellan Creek)	Cibola National Forest	1,449 acres (5.9 km2)	McClellan Creek National Grassland surrounds Lake McClellan, and nearly all of the grassland was burned in 2006.
Oglala		Nebraska 42°54′56″N 103°38′14″W / 42.91556°N 103.63722°W / 42.91556; -103.63722 (Oglala)	Nebraska National Forests	94,520 acres (382.5 km2)	The badlands of Toadstool Geologic Park are within Oglala National Grassland.
Pawnee		Colorado 40°47′38″N 104°05′01″W / 40.79389°N 104.08361°W / 40.79389; -104.08361 (Pawnee)	Arapaho & Roosevelt National Forests	193,060 acres (781.3 km2)	Pawnee has camping at Crow Valley Recreation Area and trails to the Pawnee Buttes.
Rita Blanca		Texas, Oklahoma 36°26′04″N 102°36′01″W / 36.43444°N 102.60028°W / 36.43444; -102.60028 (Rita Blanca)	Cibola National Forest	92,989 acres (376.3 km2)	Rita Blanca includes grasslands, marshes, and woodlands and is located in the Texas Panhandle and western Oklahoma.
Sheyenne		North Dakota 46°25′36″N 97°17′43″W / 46.42667°N 97.29528°W / 46.42667; -97.29528 (Sheyenne)	Dakota Prairie Grasslands	70,446 acres (285.1 km2)	Sheyenne provides habitat for the largest population of greater prairie chickens in North Dakota as well as the Dakota skipper butterfly and western prairie fringed orchid.
Thunder Basin		Wyoming 43°41′09″N 105°00′56″W / 43.68583°N 105.01556°W / 43.68583; -105.01556 (Thunder Basin)	Medicine Bow – Routt National Forest	547,499 acres (2,215.6 km2)	Thunder Basin is located in the Powder River Basin between the Big Horn Mountains and the Black Hills.

Related

The smaller Midewin National Tallgrass Prairie, created much later and east of the Mississippi River, is technically not a "National Grassland", but is managed by the Forest Service like one, as a unique prairie resource.^[3]

Name	Photo	Location[4]	Date formed	Area[1]	Description
Midewin National Tallgrass Prairie		Illinois 41°22′44″N 88°06′46″W / 41.37889°N 88.11278°W / 41.37889; -88.11278 (NAME)	1996	20,283 acres (82.1 km2)[5]	The only federally managed prairie east of the Mississippi River, Midewin is in the Central forest-grasslands transition ecoregion and was created when land was transferred to the U.S. Forest Service from the U.S. Army. In 2015, a small research herd of American Bison were reintroduced to study the effect of this large prairie animal on tallgrass prairie regeneration.