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Mount Diablo’s two peaks rise above contiguous Shell Ridge Open Space lands as we traverse this loop hike on established trails in the Open Space. The loop includes easy, moderate and slightly strenuous stretches in approximately equal portions. We climb Shell Ridge itself via a gentle switchback, hike the ridge top for about a mile, then descend at Ginder Gap and complete our loop via the shady, tranquil Indian Creek trail. Be sure to bring plenty of water, a snack, and dress in layers. Sturdy shoes or hiking boots recommended; hiking poles may be useful. Heavy rain cancels.

Land: City of Walnut Creek

Rating: Easy

Distance: 3 miles

Elevation change: 320’

Leader: Save Mount Diablo Hike Leader, Jean Vieth

Meet: Entrance to Shell Ridge Open Space at the end of Marshall Drive, adjacent to Indian Valley Elementary School in Walnut Creek. (No restrooms.)

Directions: From Ygnacio Valley Rd, head east on Homestead Avenue and take the first left onto Marshall Drive. Continue on Marshall till it dead-ends at the Shell Ridge Open Space and park along the road.