Pepperwood Preserve (est. 1979) is a nature preserve located at the southern end of California’s North Coast Ranges. Snaking between the world-renowned Sonoma and Napa Valleys, the majestic Mayacamas Mountains rise above San Francisco Bay and stretch northward past Calistoga to the east and Santa Rosa to the west. Here, across from Mt. St. Helena, near the divide of the watersheds of the Napa and Russian rivers, Pepperwood Preserve protects a 3117-acre zone of stunning landscape and rich biodiversity.