In the United States, there are 155 National Forests, covering more than 190 million acres. National forest lands are the single largest source of drinking water in the nation, providing fresh water to some 66 million people. In addition to giving many of us the water we drink, our forests also are cherished grounds of our nation's outdoor legacy. Every year, millions of Americans visit national forests for recreation and sport. Explore the diversity of our forests in this slideshow. (Visit the Forests For Our Future campaign.)
Trees growing amidst the rock formations in Utah's Dixie National Forest.
A stream flows under a fallen tree in the wintertime in Gifford Pinchot National Forest in Washington.
Scenic view of Helena National Forest in Montana as the seasons change.
Autumn in the Diamond Mountains located in California's Lassen National Forest.
Flowing waters of Bailey Creek located within California's Lassen National Forest.
A misty morning in Oregon's Mt. Hood National Forest.
The still waters of Lake Crescent located in Washington's Olympic National Forest.
Serene swamplands in Florida's Osceola National Forest.
Lake Stanley sits calmly in Idaho's Sawtooth National Forest.
A hiker walks from peak to peak in Tahoe National Forest in California.
Snow capped mountains in the Maroon Bells Scenic Area, home to a glacial valley surrounded by 14,000-foot peaks.
Tonto National Forest embraces almost 3 million acres of rugged and spectacularly beautiful country, ranging from Saguaro cactus-studded desert to pine-forested mountains beneath the Mogollon Rim.
The largest national forest in the United States, Tongass National Forest's 17 million acres covers most of Southeast Alaska.
Boundary Waters Canoe Area covers a quarter of the national forest, with interconnected lakes and rivers that can be explored by canoe.
Shawnee National Forest lies in the rough, unglaciated areas know as the Illinois Ozark and Shawnee Hills. The geology is spectacular and divergent, with numerous stone bluffs and overlooks transcending to lowland areas.
The largest national forest in California, Shasta Trinity encompasses five wilderness areas, hundreds of mountain lakes, and over six thousand miles of streams.
The southernmost national forest in the continental United States, Ocala protects the world's largest contiguous sand pine scrub forest.
Mt. Hood National Forest extends south from the strikingly beautiful Columbia River Gorge across more than sixty miles of forested mountains, lakes and streams to Olallie Scenic Area, a high lake basin under the slopes of Mt. Jefferson.
The northernmost national forest in the United States, Chugach is one of the few places left in the world where glaciers still grind valleys into the hard rock of the earth.
The Chattahoochee and Oconee National Forests offer not only stunning outdoor recreation opportunities, but are also rich in history and culture.
Most of the land supports an evergreen forest that includes pure or mixed stands of ponderosa pine, grand fir, Douglas fir, Engelmann spruce, lodgepole pine and subalpine fir.
The name "Black Hills" comes from the Lakota words Paha Sapa, which mean "hills that are black." Seen from a distance, these pine-covered hills, rising several thousand feet above the surrounding prairie, appear black.