Hike to Hidden Labyrinths in the Oakland Hills

San Francisco Sibley Volcanic Regional Preserve

Added by Kim Suarez

Not only does this hike lead to multiple hidden labyrinths, but it is also at the site of an ancient ocean and volcano! A volcano existed here about 10 million years ago. It erupted and formed Round Top Peak, which you can now hike to. Also, years of quarrying have exposed ancient bedrock and a valley where one of the labyrinths exists.

From Skyline Blvd, pull into the staging area for Sibley Volcanic Regional Preserve, you'll see the sign. Parking here is usually easy to find. You'll find an unstaffed visitor center with a restroom, park maps and informational displays featuring the history and geology of the park.

Sibley is a 31-mile trail system, leading along the ridgeline between Wildcat Canyon and Anthony Chabot Park.

From the parking lot, head up the Skyline Trail to Round Top Loop trail. Proceed on Round Top Loop heading counter-clockwise (left) on the loop. From the Round Top Loop, head left on the Quarry Trail. The Quarry Trail will hit the Volcanic Trail shortly thereafter. Take the Volcanic Trail toward spot 6 on the Preserve Map. To return, head back the way you came.  

This is a short hike, only ~2.5 miles total, but there are no water fountains along the way, only at the visitor center.

Pack List

  • Preserve Map
  • Day Pack (snacks, first aid kit, compass, whistle, bug spray, flashlight)
  • Water
  • Trail Map (You can pick one up at the visitor center)
  • Comfortable Hiking Shoes
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Activities:

Hiking

Skill Level:

Beginner

Season:

Year Round

Trail Type:

Out-and-Back

Distance:

2.5 Miles

Elev. Gain:

1763 Feet

Rating:

Features:

Bathrooms
Dog Friendly
Easy Parking
Family Friendly
Forest
Groups
Scenic
Wildflowers

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How to Get There

about 2 months ago

Average Labyrinths

This was an easy hike, as the description said, but it was very anticlimactic. The labyrinths were not to exciting when we finally found them. Also the directions to quarry trail listed above are VERY confusing. Taking skyline leads you to a different parking lot, you can still make it to the labyrinths this way, but not by taking quarry road and the volcanic trail. We ended up driving around till we found a small parking lot with a portapotty and a sign that said quarry road. We followed the paved road and then followed the volcanic trail all the way to the 6th geological stop. The labyrinths are just past this 6th geological stop. (I did not walk through a eucalyptus forest to get to the labyrinths, but I did see them across the way. I was very confused by this since the description said I'd walk through them but I was no where near them.)The labyrinths were cool to see for a one time deal but I would not go back just to see them again. But I will say that sibley is a beautiful hiking area and good for families and dogs!

about 2 months ago

9 months ago

Lush Green Hike

Very green and fresh scenery in this hike. The directions were a little hard to follow from this site, but we eventually found the labyrinths. It was windy in the afternoon so dress warm!

9 months ago

Added by Kim Suarez

Day job in fashion, outdoor explorer on the weekends. San Francisco-based but I try to leave the city and explore the surrounding areas every weekend.

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