1956 Map of Blue Mountain

About this map

Calaveras Big Trees State Park and the deep canyons of the Middle Fork Mokelumne River anchor this mid-century survey of the Sierra Nevada foothills. The landscape is defined by the transition from high-elevation timberlands in the Eldorado National Forest to the mining and ranching outposts of Amador and Calaveras counties. Evidence of the region’s hydraulic and industrial history is visible in the Panther Portal siphon and the Tiger Creek Reservoir powerhouse, while the remains of the timber and gold rushes are marked at locations like the Tough Mill (Site) and the Heckendorn Mine.