2018 Map of Eylar Mountain

About this map

Eylar Mtn rises as a central peak within the Diablo Range, overlooking a complex network of canyons and gulches that define the border between Alameda and Santa Clara counties. The landscape is carved by significant drainage systems including the Arroyo Valle and Arroyo Mocho, which dictate the orientation of the surrounding ridges. Historical access to this high-country terrain is marked by Mines Rd, a winding artery through the hills, and specialized cattle or resource corridors like Graveyard Rd. This 2018 survey reveals the persistent remote character of the region, where pockets of relatively level ground such as Sherman Flats, Ingram Flat, and Blackbird Valley stand out against the steep relief of Man Ridge and Valpe Ridge. The name-rich topography, from Horsethief Canyon to Deadman Gulch, hints at the storied ranching and mining heritage of the California Coast Ranges.