1955 Map of Cisco Grove

About this map

The South Fork Yuba River carves a central path through this Sierra Nevada landscape, serving as a corridor for the Southern Pacific railroad and Highway 40. This mid-1950s survey captures a high-elevation environment defined by a dense network of alpine lakes and infrastructure, from the Lake Valley Reservoir to the Carlisle Mine near Old Man Mtn. Cultural footprints are concentrated along the river and rail line, where settlements like Cisco Grove, Cisco, and Big Bend supported travel and transit. The presence of the Marin-Sierra Boy Scout Camp and the 4H Club Camp indicates the area's role as a mid-century recreational destination. Higher elevations are marked by technical landmarks including a Microwave Relay Sta, an Airway Beacon, and the S P Lookout (Aband) on Signal Peak.