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Lewis and Clark National Forest
IUCN Category VI (Managed Resource Protected Area)
Location:	Montana, USA
Nearest city:	Great Falls, MT
Coordinates:	47°11′0″N, 111°27′0″W
Area:	1.8 million acres (7,300 km²)
Established:	1897
Governing body:	U.S. Forest Service

Lewis and Clark National Forest is located in north central Montana, United States. Spanning 1.8 million acres (7,300 km²), the forest is managed as two separate zones. The eastern sections, under the Jefferson Division, is a mixture of grass and shrublands dotted with "island" pockets of forested areas. Here, cattle leases to local ranchers as well as timber harvesting are the norm. The western Rocky Mountain Division which straddles the Continental divide, is more oriented more towards preservation, primarily because much of the land has been designated as wilderness.

The forest lands were originally created in 1897 which makes this forest one of the oldest forest preserves in the U.S. The forest is named in honor of the members of the Lewis and Clark Expedition, which passed through the forest between 1804 and 1806. Prior to that the region was inhabited by Indians for a period of at least 8,000 years and when the expedition first came to the area, the Blackfeet, Sioux, Cheyenne, Flathead and Crow Indians all utilized the forest for hunting and as protection from the winter.

Lewis and Clark National Forest

Altitudes range from 4,500 feet (1,400 m) to the top of Rocky Mountain Peak at 9,362 feet (2,900 m). The forest is divided into seven separate sections and encompasses eight mountain ranges; the Judith, Big Snowy, Little Snowy, Crazy, Castle, Little Belt, Big Belt and Highwood Mountains. The westernmost section includes portions of the Great Bear, Scapegoat and the Bob Marshall Wildernesses, and also borders Glacier National Park, which is to the north.

The western Rocky Mountain Division consists of a dense coniferous forest and has numerous species of spruce, fir, larch and pine. The Jeffereson Division is dominated by ponderosa and lodgepole pine which prefer a dryer climate. The Grizzly bear and wolf are found in the western sections of the forest, and are especially dense in the designated wilderness areas. In addition, the western section contains much of the wildlife present when the Lewis and Clark Expedition first passed through the region. Mountain goats, bighorn sheep, elk, mountain lions, lynx, wolverines and black bears are most common nearest the Continental divide. In other sections of the forest, black bears, mule deer and white-tailed deer are the largest mammals found. Throughout the forest, Bald Eagles, grouse, peregrine falcon and red tailed hawks are increasing in numbers. Lakes and streams are more numerous in the western section due to a higher altitude and more precipitation and are home to the rare westslope cutthroat trout, which may become the one of the latest endangered species. In the 1,600 miles (2500 km) of rivers and streams in the forest, Rainbow trout, brook trout and northern pike are relatively common however. Excellent fly fishing opportunities are plentiful, especially in the Smith River.

There are 29 vehicle accessible campgrounds to be found on the Lewis and Clark National Forest. Two ski areas also operate within the forest. Almost 1,500 miles (2,400 km) of hiking trails provide access to remote locations in the seven different mountain ranges over which the forest presides. Solitude is most common in the Crazy Mountains and in the wilderness areas near the Continental divide. Summertime high temperatures average in the 70's (fahrenheit) but the winter can be very cold, especially in the more exposed eastern sections and snow can linger for up to 10 months of the year along the Continental divide.

• U.S. Forest Service. Lewis and Clark National Forest. Retrieved on 2006-07-08.