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.

Take Quarry Road (the paved road to the right of the visitor center) up until it meets with Volcanic Trail. Follow the trail to the right. It will take you through a eucalyptus forest before opening up to grassy hills. Keep following the trail down to the left and it will open up above the quarry. Look down and you will find the first labyrinth. Keep following the trail to the left to ascend Round Top Peak and discover the second labyrinth along the way.

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

  • 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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Skill Level:



Year Round

Trail Type:



2.5 Miles

Elev. Gain:

1763 Feet



Dog Friendly
Easy Parking
Family Friendly

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How to Get There

5 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!

5 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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