Southwest Slopes of Mt. Diablo

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  • Admission:
  • Location:
    Macedo Ranch Staging Area
  • 3076 Green Valley Rd
  • Alamo, CA 94507
  • Time:
    9:00 AM to 1:00 PM
  • Email:

Spring is a wonderful time to hike this loop on the lower slopes of Mount Diablo’s southwestern side. Our route, which includes portions of Stage Rd, Barbecue Terrace and Wall Pt Rd, takes us through big skies and open grasslands, woodland, and along a wide rocky vein with magnificent valley views. Bring plenty of water and sun protection, since about half the hike lacks shade.

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

Due to COVID-19, we are limiting the hike to 8 participants. All participants must bring a mask and stay 6ft apart. Hand sanitizer will be available at the hike.

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

Entrance fee per car: $5 seniors, $6 others — exact cash required.

Land: Mount Diablo State Park

Rating: Easy to Moderate

Distance: 6 miles

Elevation change: TBD

Leader: Jean Vieth, Save Mount Diablo Volunteer Hike Leader

Meet: Macedo Ranch Staging Area

Directions: From Concord or Orinda, take I-680 S to exit 42A onto Stone Valley Rd E; turn right onto Stone Valley Rd and continue for 3 miles; turn left onto Green Valley Rd and continue for 1.2 miles — the staging area is at 3756 Green Valley Rd. From south of Alamo, take I-680 N to exit 39 onto Diablo Rd; turn right onto Diablo Rd. and continue for .7 miles, then turn right to stay on Diablo Rd; continue for .6 miles and turn left onto Green Valley Rd; continue for 1.9 miles to the staging area.

(Picture by Chris Foster)


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 contact Denise Castro at

How can I contact the organizer with any questions?

You can reach Denise Castro, Outreach & Education Associate, at