Rock Out! Geology of Sonoma County

April 19, 2020 from 10:00 11:30 AM

Sonoma Valley Regional Park

13630 Highway 12

Glen Ellen, CA 95442
38.36425861, -122.5122456

Step back in time as we explore how plate tectonics and volcanic activity have shaped our landscapes. Learn why Sonoma County is home to such rich geologic diversity and how that diversity has informed the history of the region. Hikes will be 2-3 miles and will include mild to moderate inclines. Free. Parking $7 or free for Regional Parks members. For more information, contact Ellie Muelrath by email at or by phone at (707) 539-2865.

February 16 - Gualala Point Regional Park - Bluff Top Coastal Access Trail
Learn about plate tectonics and coastal rock formations. Explore the boundary of the North American and pacific plates while marveling at unique geological sites along the Sonoma Coast. View sandstone formations chiseled by the elements and 90-million-year old rocks that were once connected to the Monterey coastline. Dress in layers and expect a level 2-mile walk along the bluffs of Sonoma County’s northern most park.

April 19 - Sonoma Valley Regional Park
Learn about the region’s mining history and Sonoma County’s participation in the boom and bust mining practices that occurred across the state. The Valley of the Moon and the surrounding hills were home to many quarries that helped shape the landscapes of local public lands and contributed to the building of California both before and after the 1906 earthquake. Expect moderate inclines as we explore both the history and the trails of Sonoma Valley Regional Park.

Visit Sonoma Valley Regional Park

Sonoma Valley Regional Park wildflowers

Sonoma Valley Regional Park is in the center of the Sonoma Valley, next to the village of Glen Ellen.