Looking for a great trail in Robert Sibley Volcanic Regional Preserve, California? AllTrails has 7 great hiking trails, trail running trails, walking trails and more, with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers, and nature lovers like you. Just looking to take a quick stroll? We've got 5 easy trails in Robert Sibley Volcanic Regional Preserve ranging from 1.7 to 7 miles and from 767 to 1,620 feet above sea level. Start checking them out and you'll be out on the trail in no time!

hiking

nature trips

running

bird watching

walking

forest

kid friendly

views

wildlife

Not many Bay Area residents know that they have a volcano nearby but Sibley Volcanic Regional Preserve is home to one! This volcano, Round Top, dates to about 10 million years ago and is the source of all the volcanic rock in the park. The unstaffed visitor center provides a thorough geological history of the park through display panels and specimens. Park Hours: 7am to 6pm Nov-Feb; 7am to 10pm Mar-Oct Fees: No fees

hiking
no shade
rocky
12 days ago

nice trail loop options and fairly relaxed hiking.

hiking
no shade
rocky
1 month ago

The main takeaway is that signage is very poor. The AllTrails instructions are great, but this loop involves several different named trails, and with all the other trails and dirt roads branching off the trail, it's hard to follow. The second impression is that this is more of a desert hike, very exposed. We worried about heat sickness, and we ran out of water even on this relatively easy hike. Would be better in the rainy season, as the hills were completely brown and dusty this time of year. We also had to cross through a bunch of powerline construction equipment in the paved road section of the trail, which was not what we expected. Not our favorite hike, but it was good exercise.

I recommend the first half of this trail. The last 1mile is super steep, be careful.

hiking
1 month ago

This is an easy trail that is easy to follow. I went solo with a 7, 4 and 11 month old. The older two easily walked the full route and it took us an hour with stops for water and snacks. There is lots to see and variety (meadows, views, forest). You could not take a stroller if you have an infant.

hiking
no shade
1 month ago

hiking
no shade
scramble
1 month ago

Ok. Lord of grassland with dirt roads running everywhere. Last fifth was very nice.

Well, I’m giving this trail an overall good rating because it was a beautiful and well-shaded trail. But I would rate the All Trails app as a 1-star for this run. I got so turned around lost the trail many, many times. From the get-go, the app kept showing me as being off-course, but there was no trail where it said I should be. So I had to stop a bunch of times just to figure out where I was. I ended up running the two loops completely out of sequence and overlapping parts I wouldn’t have normally had to. Anyway, if you take out all of the times I had to stop and check where I was, it was good while I was running. Oh, and I saw a rather large snake, which appeared to have a rattle on the end of the tail (but I didn’t want to get too close to figure out for sure). Last but not least, the All Trails app said I ran 8.1 miles, while MapMyFitness said I ran 7.27. That’s a pretty significant difference.

Beautiful scenery and nice trails.

Nice trail! I did counter-clockwise. It’s full of colorful ground in the first part, due to its volcanic nature. Not so cute in the middle, where the trail continues in a road pavement. The last part is in the woods, with a lightly steep mile. Lot of raspberries/blackberries, plants, rocks and some panoramic views.

I didn’t follow the planned route because I’ve seen most of it before, but the huckleberry section is one of the most beautiful trails in the east bay. Near on the Sibley section, there are lots of cool trail marker the point out ancient volcano geology, and you can almost see the entire bay at some of the high points, then turn around and see Mt. Diablo. Lots of elevation change and gravel that might be slippery and loose. The beginning section from old tunnel road gets so muddy when it rains that it’s almost not worth trying—unless you have some galoshes or don’t mind getting mud up to your ankles.

Great, not too hard of a trail. First half has beautiful views of the valley, Mt. Diablo, and central valley. Large open skies and expansive terrain. The ambiance suddenly changes in the Skyline portion of the trail in the valley floor, running parallel to a creek. You're surrounded by trees and can hear the flow of the stream. Great midafternoon trail or something quick to run thru in the morning. Highly recommended.

Off leash dogs okay if under voice control, just make sure you’re reading the signs for when they must be leashed. Mid part of hike is fairly exposed with some fox tails so keep your fur-baby close. Watch for snakes and ticks. Start and finish of the train had some shade but also had a lot of poison oak along the route. Easy hike, but enough elevation gain to give you a good workout if you’re just getting back into hiking regularly. Beautiful views and decent parking.

hiking
2 months ago

Easy and straightforward, highly recommend for a quick afternoon walk.

hiking
bugs
muddy
no shade
rocky
2 months ago

moderate trail for me as newbie out-of-shape hiker. pretty easy to follow. last quarter of trail is all uphill. a bit buggy, but shady. pretty busy with other hikers and doggies.

Sides of the trails were LOADED with poison oak. Also, signage for getting to the volcano and labyrinth were poor.

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