1991 Map of Alamo Mountain

About this map

Harris Mill (Site) and Lexington (Site) mark the historical footprint of early activity within the rugged Ventura County landscape, where gold prospecting and ranching once defined local life. The map reveals a network of high-altitude peaks and drainage systems, centered on the massive presence of Alamo Mountain and McDonald Peak. Resource extraction is evident through features like the Gold Hill Mine, Harris Mine, and Castaic Mine, reflecting a history of mineral exploration in the canyons. The eastern edge transition into the Hungry Valley State Vehicular Recreation Area highlights the land's shift toward modern recreational use. Water sources are critical landmarks here, from the perennial flow of Piru Creek and Agua Blanca Creek to numerous isolated Springs and Falls that supported isolated outposts like the Schmidt Ranch (Site) and Baker Cabin.