|Location||Del Norte / Siskiyou / Humboldt counties, California, United States|
|Nearest city||Crescent City, California|
|Area||182,802 acres (739.77 km2)|
|Governing body||U.S. Forest Service|
The Siskiyou Wilderness is a federal wilderness area designated by the passage of the California Wilderness Act of 1984. Originally, the land area was 153,000 acres (620 km2) The Northern California Wild Heritage Act of 2006 added 30,122 acres (121.90 km2) for the current total of 182,802 acres (740 km2). All of the wilderness is in Northern California and is managed by the U.S. Forest Service. The wilderness spans three national forests; Siskiyou, Klamath, and the Six Rivers.
The Siskiyou Mountains form one of the longest continuous crests in the Klamath Mountains region. Elevations range from 770 feet (230 m) to the summit of Preston Peak at 7,309 feet (2,228 m) above sea level. Trending in a north-south direction from the Oregon state border down to near the town of Weitchpec and 20 miles (32 km) inland from the Pacific Ocean, the Siskiyous are dotted by rocky peaks rising over 6,000 feet (1,800 m) from the surrounding lowlands.
Flora and fauna
The Siskiyou Wilderness contains a diverse collection of conifer species including rarities such as Alaska cedar, Port Orford cedar, and the Klamath Mountain endemic Brewer Spruce. It is notable for the vast amounts of old-growth forests and many endemic species of wildflowers, shrubs and trees as well as one of the world's largest concentrations of lilies.
The wilderness is home to several rare species, including wolverine, martin, fisher, northern spotted owl and Roosevelt elk. There is also black bear, black-tailed deer, and many varieties of birds. The clear streams provide spawning grounds for steelhead, coho and chinook salmon.
The wilderness is very lightly used, even though it has 16 trailhead access points. The Clear Creek National Recreation Trail crosses 20.5 miles (33.0 km) of the northern portion and provides access to some of the more scenic parts of the wilderness -- from near the Klamath River to the Smith River (California) divide. In the southern part of the wilderness the Kelsey National Recreation Trail begins in the wilderness at Bear Lake and the experienced hiker can walk for 20+ miles to the Smith River. The most heavily visited areas are in the northwest corner of the region -- concentrated on trails that lead to lakes. Much of the area lacks trails and is difficult to access cross-country because of the dense brush.  The Bigfoot Trail traverses the crest of the wilderness from north to south, through some of the most remote areas.
- Adkinson, Ron (2001). Wild Northern California. The Globe Pequot Press.
- Official website of Klamath National Forest Retrieved 2007-10-01
- Preston Peak Botanical and Geological Area
- Hike Description to the Devil's Punchbowl