1993 Map of Letterbox Hill

About this map

Modoc National Forest encompasses the majority of this high-elevation landscape, where a series of volcanic-named features and upland plateaus dominate the terrain. Significant water management for the region is evident through a network of catchments including Myers Reservoir, Whit Flat Reservoir, and McClelland Reservoir, which likely supported local ranching or forest service operations. The southern portion of the sheet is designated as a State Game Refuge, covering the broad reaches of Hayden Hill and Silva Flat. Land navigation is marked by specific crossings and landmarks such as Stonebreaker Crossing and Letterbox Hill. The presence of numerous seasonal springs like Deer Spr and Myer Spring suggests a landscape defined by intermittent water sources and the shifting needs of mountain land use in the late twentieth century.