Spotlights
In the Wintun Indian language, "Yo-la" meant "snow covered", and "Bo-li" meant "high peak." The second part of this Wilderness' name refers to the headwaters of the Middle Fork Eel River, which originates in this remote and rugged land.This area was first protected in 1931 when it was classified as a primitive area. Further protection was given when this area became part of the National Wilderness Preservation System, created by the passage of the Wilderness Act of 1964. The Wilderness Act of 1984 added another 2,000 acres to the Yolla Bolly-Middle Eel Wilderness, for a total of about 151,626 acres.
The Wilderness is roughly oval in shape, being about 19 miles long in the north-south direction and 24 miles wide in the east-west direction. The majority of the Wilderness lies in two districts of the Mendocino National Forest (Covelo and Grindstone Ranger Districts). The far northern portion of the Wilderness is in the Yolla Bolla Ranger District of the Shasta-Trinity National Forest. To the far west, a part of the Wilderness is in the Mad River Ranger District of the Six Rivers National Forest, and the Bureau of Land Management has a small portion of the Wilderness (also on the western edge).
The lowest point of the Wilderness is along Cottonwood Creek (2,600' elevation). This is just four and a half miles from the highest point, Mount Linn, at an elevation of 8,092 feet. Several other peaks push their way above 7,000 feet and provide fine views (weather and smoke permitting) of Mount Lassen, Mount Shasta, the Trinity Alps, the Kings Range and sometimes the Pacific Ocean.
The 10, 571 acre Sanhedrin Wilderness was established in 2006 by Public Law 109-362, the Northern California Coastal Wild Heritage Wilderness Act. The Great Sanhedrin was the supreme council of the ancient Hebrews and the imposing ridge that crowns this Wilderness was named after that high council. The terrain in this area is moderately steep and rugged. The Wilderness is managed by the Forest Service, but includes areas of private land.
Elevations in the Wilderness vary from 6,175 feet at Big Signal peak to 1,600 along Thomas Creek. The major creeks in the area drain westward to the Eel River. Soils are moderately to highly erodible, and an unstable fault zone transects the Rocky Point-Ascherman Ranch area.
Trails in the Sanhedrin
Developed trails do not exist within the Sanhedrin at this time, providing a truly untrammeled Wilderness experience. The only public access point for this area is by the lookout on Big Signal Peak at the end of Forest Road 20N04. From this location, visitors can enjoy off trail hunting, hiking, and camping activities.
Although you may come across an old road or cattle trail while visiting the Sanhedrin, no managed trails existed upon designation of the Wilderness. Employees and wilderness stewardship volunteers have begun to identify potential opportunities to designate and maintain foot and horse trails in the Sanhedrin for future use and enjoyment.
We recommend that when visiting the area you bring the U.S. Geological Survey (USGS) 7.5-minute topographic maps that cover the region: USGS maps for the Sanhedrin Wilderness include Sanhedrin Mountain, Brushy Mountain, Foster Mountain, and Van Arsdale Reservoir. PDF MAP »
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