2018 Map of Alleghany

About this map

Alleghany serves as the central hub of this Sierra County landscape, where the geography is defined by the steep descents into the Middle Yuba River and Kanaka Cr. This modern survey reveals the persistent imprint of historical mining and timber infrastructure across the Tahoe National Forest, with numerous level benches or "flats" suggesting former sites of activity, including Minnesota Flat, Orleans Flat, and Moores Flat. The network of roads such as Henness Pass Rd and Plumbago Rd follows the high ridges, connecting the small settlement of Plumbago with more remote landmarks like American Hill. Steep ravines, from Jersey Ravine to the Golconda Ravine, score the mountainsides, illustrating the difficult terrain that historically defined the region's extraction industries. Water sources remain critical features of the topography, including numerous named springs like Mammoth Spring and Dempsey Springs.