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2018 Map of Letterbox Hill

Name: 2018 Topographic Map of Letterbox Hill
Creator: U.S. Geological Survey
Published: 2018
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2018

About this map

Modoc National Forest encompasses a significant portion of this high-altitude landscape in Lassen County, where a complex system of water management features highlights the region's ranching and resource history. Multiple catchment basins such as Whit Flat Reservoir, Packwood Reservoir, and McClelland Reservoir are distributed across the terrain, suggesting a managed approach to the area's seasonal hydrology. The landscape is punctuated by distinct volcanic or tectonic rises, including Manzanita Hill and Letterbox Hill, the latter of which overlooks the deep Letterbox Canyon in the southeast.

Transportation throughout the area relies on a network of named tracks and spurs like Anderson Ranch Rd and Cary Spring Spur, which provide access to reliable water sources such as Meyer Spring and Deer Spring. The presence of numerous named flats, from Windmill Flat to Myer Flat, indicates a geography defined by open basins separated by rising peaks and ridges, maintaining a character consistent with northern California's interior timber and grazing lands.