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Blue Oak Woodland Tour from Hanna Grove

November 18 @ 9:00 am - 12:00 pm

All Discover Diablo hikes are subject to, and will honor, all applicable COVID-19–related restrictions in place for our area.

This loop hike through blue oak woodland leads us from Borges Ranch into the adjacent Shell Ridge Open Space and back via a mix of fire roads and footpaths on the quieter, north side of the Shell Ridge formation. Most of the route is easy and relatively level, though a few moderate climbs/descents add interest and views of Mount Diablo and the surrounding area.

Be sure to bring plenty of water, a snack, and dress in layers. Sturdy shoes or hiking boots are recommended. Heavy rain cancels.

Restrooms are available at parking lot.

Hike is limited to 20 participants.

Participants will also be required to accept our COVID-19 Protocol (available during registration).

Land: Walnut Creek Open Space

Rating: Easy/Moderate

Distance: 4.3 miles

Elevation change: Max elevation is 693’ & minimum is 366’

Leaders: Jean Vieth, Save Mount Diablo Hike Volunteer

Meet: Patrick Hannah Grove Picnic Area

GPS Coordinates: 37.892005050510235, -122.00291296066662

Directions: Old Borges Ranch Picnic Grounds, 1035 Castle Rock Rd, Walnut Creek, CA 94598

(Photo by Bob Walker)


When does registration open for this event?

Each Discover Diablo event opens up for registration exactly 2 months before the day of the event at 10AM. All events are first come, first serve.

 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



November 18
9:00 am - 12:00 pm
Event Category:


Patrick Hannah Grove Picnic Area
1035 Castle Rock Road
Walnut Creek, CA 94598 United States

Join us to save the remaining natural lands of Mount Diablo!

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