1956 Map of Telegraph Peak

About this map

Wrightwood and the high-altitude landscapes of the Angeles National Forest define this mid-century survey of the eastern San Gabriel Mountains. The map clearly delineates the San Andreas Rift Zone as it cuts through Lone Pine Canyon, a striking geological feature that dominates the central portion of the quadrangle. High peaks like Telegraph Peak, Thunder Mtn, and the iconic Mt Baldy Notch stand over a terrain marked by deep canyons and scattered mountain outposts. Local history is recorded through family-named landmarks such as Nielson Ranch and Clyde Ranch, alongside the Pioneer Historic Marker near the Cajon Basin. The presence of several Prospect labels and a Shaft reflect the region's mining history, while the Angeles Crest Highway provides the primary arterial access through this steep, complex topography.