See and touch ancient basalt and sandstone. Discover the complex geologic history of the Calaveras-Hayward fault areas within the greater Diablo Range. Meet at the boat launch area. (408) 918-7980
Bay Nature’s events calendar has events from nature organizations all over the Bay Area. Find guided Bay Area hiking, learn about Bay Area wildlife, and more. Learn about our In the Field outings. Or submit your own event.