Sibley Volcanic Regional Preserve

The Round Top Loop Trail at about 1.5 miles is prefect for little kids and dogs and affords gorgeous and varied views of Mt Diablo , the Bay , and the many valleys in between.

Pick up a map and follow to marker no. 2 for a view of the remains of the crater of the volcano that once reigned lava here... also nice view of Mt . Diablo from that spot.

so many trails ! some are dog/horse/bike friendly , so truly no matter what you’re looking for hike-wise, it’s here! come early for easy parking .

Walking up the Quarry Rd. from Old Tunnel Staging Area is the best-- .8 miles straight on up, then along the ridge to Skyline Staging, back down the BA Ridge / Skyline trail - watch out for poison oak!

Really beautiful park , great for dog owners since most of it is off-leash! :)

It gets cold as $#!+ out here after 6 o clock so prepare warm clothing and don't wear Sandals...

Best views of the city ever as you drive into the park ! Keep a look out. Also bug repellant is not a bad idea

Beautiful views ! No crowds. Easy access ! No mud after the rain.

Very pretty scenic trails ! Amazing view !

So peaceful . Can get pretty windy though. Bring a light hoodie just in case

This place is awesome!! Great views , easy trails .

Great for letting your dogs explore off leash

Awesome place and great for dogs -- but be sure to check yourself (and the dog) for ticks!

Beautiful! So many awesome sights!

good for night hikes and watching meteor showers

Dogs OK off leash

Great dog walk. Great dog walk Read more

Great views , relaxing hikes