1955 Map of Mt. Day

About this map

Mt Day and Mt Lewis anchor this 1955 survey of the Diablan heights along the Alameda Co and Santa Clara Co border. The landscape is defined by a series of steep, parallel ridges including Oak Ridge, Poverty Ridge, and Beartrap Ridge, cut by the deep drainage of Arroyo Hondo. This mid-century study captures a transitional interior wilderness where seasonal encampments like Old Camp and New Camp were still named landmarks and water management was becoming more formal, evidenced by the Upper Cherry Flat Reservoir and the eastern edge of Calaveras Reservoir. A network of Jeep Trails provides the primary access through the canyon systems of Isabel Creek and Alameda Creek, tracing routes into high flats like Van Horn Flats.