Located in the Klamath and Six Rivers National Forests in California.

The Siskiyou Wilderness encompasses 153,000 acre and is managed by three National Forests. Most of the use of the wilderness occurs at Clear Lake, Pine Creek Basin, Patterson Lake and Summit Trail. The best time to travel within the wilderness is July to mid-October. Severe weather can occur in any month. Forage is limited and stock feed is advisable. Cross country travel is almost impossible due to dense vegetation.

Perennial streams include Clear Creek, Upper South Fork Smith River, and the headwaters of the East Fork Illinois River. Complex plant communities including brush, glades, wet meadows and forests of Douglas fir, ponderosa and sugar pines, Port Orford cedar, and mixed hardwoods are found within the area. The Upper South Fork Smith River, a designated Wild and Scenic river, and the South Kelsey National Recreation Trail are in the northern part of the area. The Oregon National Monument is north of the area. Part of the Helkau District, listed in the National Register of Historic Places, is near Blue Creek in the southern part of the wilderness.

TRAIL ACCESS: The southwest side can be accessed from U.S. 199 onto County Road 427 to Forest Service Road 15N01. F.S. Road 15N01 will take you to the South-Kelsey National Recreation Trail and the Summit Valley Trail. The west side can be accessed from U.S. 199 onto F.S. Road 17N08 to F.S. Road 17N05 to F.S. Road 16N02. F.S. Road 16N02 will take you to Devil's Punchbowl Trail, Clear Creek Trail, Buck Lake Trail and the Island Lake Trail. The northwest side can be accessed from U.S. 199 onto F.S. Road 18N07. Forest Service Road 18N07 will take you to Clear Creek Trail, East Fork Illinois Trail, Twin Valley Trail, and Raspberry Lake Trail.