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The Access Fund acquired a conservation easement and access easement on the Jailhouse Rock property in 2010 when access was threatened by an impending housing development. Although the property is still privately owned, the Access Fund-held easements guarantee climbing access into perpetuity. Jailhouse Rock boasts up to 200 feet of overhanging amphitheater on the western face of a basalt lava flow known locally as Table Rock. Jailhouse Rock is a major resource for the Bay Area, Yosemite, and Sacramento climbing communities during the fall, winter, and spring months when other sport crags are covered in snow.
In 2010, an impending subdivision which included the trailhead and initial approach trail threatened future access to Jailhouse. Plans to further subdivide the land adjacent to Jailhouse could have blocked access even further, since the trail would need to cross multiple new lots purchased by private landowners who may be less inclined to grant public access.
Driving directions: From the Bay Area, take I-580E and continue on I-205E. Take I-5N to CA-120E. 24 miles after downtown Oakdale, turn left on O’Byrnes Ferry Rd/ CO Rd E15 (this is less than one mile before the Yosemite Junction, where Highways 108 and 120 diverge). Drive 3.7 miles and turn right at a double gate. DO NOT TURN INTO THE "SHOTGUN CREEK ESTATES" GATE (this is private proptery). Continue past Shotgun Creek Estates to the following double gate on the right hand side. Enter the gate code and close the gate behind the vehicle. Do not park outside this gate at any time as the owner does not want to draw attention to this gate. Turn left and follow the dirt road ¼ of a mile to a fenced parking area on the right and close the gate after entry. Otherwise, your vehicle may become a tasty treat for a curious horse.