2018 Map of Telegraph Peak

About this map

The San Andreas Fault slices through the high country of the San Bernardino National Forest and Angeles National Forest, marking the dramatic geological divide of the San Gabriel Mountains. High-altitude settlements like Swarthout Valley and Manker Flat serve as access points to a network of trails and ridges, most notably the Pacific Crest National Scenic Trail as it traverses Blue Ridge and Telegraph Peak. The landscape is defined by deep incisions such as Lone Pine Canyon and Wildhorse Canyon, with seasonal water flow visible in Big Dutch Wash and the various forks of Lytle Creek. For local historians and recreationists, the map preserves the alignment of the Devils Backbone and the specific locations of Mount Baldy Notch and Miners Bowl, illustrating the area's transition from early mining prospects at Gold Ridge to its modern role as a major alpine recreational hub.