November 23 – Lay of the Land: Geology + Hydrology Hike at Big Hill Preserves 

Let our Geologist docents take you on a special hike focusing on the geology and hydrology of the foothills. This rural land has distinctive rock outcrops and a year-round stream that sources one of the regional irrigation canal systems. The hike takes us to a high point in the region, with views from the Coast Ranges to the Sierra Nevada. We discuss how this beautiful landscape evolved over millions of years and how it relates to the geology of greater California. Discussions include topics in earthquakes, volcanoes, and the source and fate of Sierra Nevada surface water. This hike has become one of our most popular activities and fills up fast!