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Hike Details for Mount Diablo Twin Peaks/Mitchell Rock Loop

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Mt. Diablo State Park
Mount Diablo Twin Peaks/Mitchell Rock Loop

City: Clayton
Region: EastBay
Park: Mt. Diablo State Park

Saturday, August 18, 2007 @ 9:00 AM


Event Notes:

Meet at the end of Regency Drive in Clayton. Advise parking in the residential section of the street rather than the end, since there have been some breakins there. This is a predominantly shady hike, which is a desirable characteristic for August. We'll see just about every feature Mount Diablo has to offer -- rock formations, chapparal, pines, meadows, oaks, and the venerable Mount Diablo Manzanita. This hike is co-sponsored by the Mount Diablo Interpretive Association.

Contact: Helene Crowley
Cell Phone: (925)


Trail Notes:

This loop incorporates Eagle Peak, Mitchell Rock, and Coulter Pine Trails. Start of Eagle Peak Trail is reached by sections of Bruce Lee and Back Creek Roads; its beginning may be a little faint, a few feet from the spot where the Coulter Pine Trail takes off, leading uphill opposite a downed oak tree. At first the trail parallels Back Creek Road. The Eagle Peak Trail climbs steadily to meet the Mitchell Rock Trail at the crest of Twin Peaks. Visitors have forged a maze of informal trails, but stick to the crest to descend, to the lower Twin Peak, and you won't have any trouble. Pause to admire the brilliantly colored rocks and the venerable Great-Berried manzanita, survivors of many fires, with exquisite blooms in January and February. Take care - Twin Peaks have dangerous vertical drop-offs! Mitchell Rock Trail returns to Murchio Road. From there, continue along until we reach Regency trail, returning back to the gate. This is a wonderfully scenic loop at any time of year, passing through several distinct habitat zones - meadow lands, oak savannah, chaparral, rocky summits. and a fine stand of Coulter pines. Approximately 6 miles, with an elevation gain of 1220 feet.


Trailhead Directions:
Click Here for a Map

From I-680 Northbound or Hwy 24 East, exit at Ygnacio Valley Road (at Walnut Creek). At bottom of offramp at the stoplight, turn RIGHT on Ygnacio Valley Road. Proceed on Ygnacio Valley Road to Clayton Road in Concord (approx 7.5 miles) and turn right (east). From I-680 Southbound, exit at Treat Blvd (at Walnut Creek). Turn left at the stop light, then immediate left at the next stop light (Treat Blvd). Follow Treat all the way up the hill into Concord (approx 8 miles). Turn right onto Clayton Road. Proceed downhill on Clayton Road into the town of Clayton. At stoplight, turn Right onto Regency Drive. Follow to the end. From Antioch/Pitttsburg, take Kirker Pass Road westbound and down the hill into Concord. Just past the Concord (Chronicle) Pavilion, turn LEFT at the light at Concord Blvd. Just past Indian Wells Way, Concord Blvd becomes Oakhurst Drive. Stay on Oakhurst and get into middle lane as you approach the intersection with Clayton Road (stoplight). Turn LEFT onto CLAYTON ROAD/MARSH CREEK ROAD. Then turn RIGHT at stoplight onto REGENCY DRIVE. Continue to the end.

Parking Fee: None

The trailhead information on this page was last updated
Friday, June 29, 2007.

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