Hike the trail above Castle Rock Recreation Area to Pine Creek and then into Mount Diablo State Park, returning via other regional park trails. Sights abound, including the sandstone formations where peregrine falcons nest sometime between February 1 and July 31, mixed woodland habitat, and open grassland. Be sure to bring plenty of water, a snack, and dress in layers. Sturdy shoes or hiking boots are recommended; hiking poles may be useful. Restrooms available. Heavy rain cancels.

This hike is limited to 20 participants.

Land: East Bay Regional Park/Mount Diablo State Park

Rating: Easy to moderate/strenous depending on route

Distance: 5.6 miles

Elevation change: 550′

Leader: Jean Vieth, Save Mount Diablo Hike Leader

Meet: Park entrance near 1700 Castle Rock Road, Walnut Creek, CA 94598

GPS Coordinates: 37.89385453288217, -121.9941636777124

Directions: Exit I-680 on Ygnacio Valley Road in Walnut Creek and drive east. After about three miles, turn right on Walnut Avenue and continue about two miles to the traffic circle at the end; then take the first exit onto Castle Rock Road and follow it to the end of Castle Rock Road. There is informal parking near the park entrance at the end of Castle Rock Road and an overspill parking lot nearby.

Photo by Jennifer Russell

FAQs

Are dogs allowed on Discover Diablo hikes?

No. Some Discover Diablo hikes take place on land owned by other organizations (such as Mount Diablo State Park & East Bay Regional Park lands) and many of the trails on these properties have a strict no-dog policy.

Are there ID or minimum age requirements to enter the event?

Anyone under the age of 18 will need to be accompanied by a parent or guardian.

Do I have to bring my printed ticket to the event?

No. On the hike day, we will have a roster with your registration information on it. Please make sure to check in with the hike leader.

Can I update my registration information?

Yes. If you would like to change anything, please reach out to discoverdiablo@savemountdiablo.org.

How can I contact the organizer with any questions?

You can contact us at discoverdiablo@savemountdiablo.org.