Articles

Ever since the story of Adam and Eve, western culture has had an aversion to snakes...

Autumn is a delightful time to hike the golden hills of Mount Diablo...

Guess what naturalist Ken Lavin got when he organized a hunt for some big, hairy spiders: A crowd!

Late summer and fall is tarantula time on Mount Diablo...

Each year in late summer, male tarantulas born between four and seven years ago find a secluded place and lay down a sheet of silk webbing...

As the sun set and a light wind blew through the valley oaks, five of us gathered in the Mitchell Canyon parking lot for a leisurely evening hike...

Full color folding geology map of Mount Diablo State Park. Map side contains an overlay of our trail map showing the geologic formations that make up the mountain. The reverse contains detailed descriptions of formations, geologic timelines and more.

Rising 3,849 feet, Mount Diablo forms a prominent feature in the East Bay landscape. Our understanding of the geological history of the rocks and structure of Mount Diablo has undergone major changes during the past 30 years...