1955 Map of Eylar Mtn

About this map

The Alameda Co and Santa Clara Co border bisects this rugged 1955 survey of the Diablo Range, where a network of trails and canyon drainages defines the remote landscape. Notable outposts like Hays Camp, Mowry Camp, and Colorado Camp are scattered across high ridges and flats, connected by primitive paths like Mines Road and numerous unnamed jeep trails. The complex topography features prominent landmarks such as VABM 4089 Mocho and the high Mesa Ridge, alongside narrow passages like The Narrows in the Arroyo Valle canyon. This era of mapping shows the land before significant development, preserving the locations of isolated settlements such as Graves and Camp Bessie within the folds of the Burnt Hills. The abundance of seasonal springs, including Banta Spring and McClinchey Spring, highlights the critical water sources that dictated human activity in these steep gulches and valleys.