Loading map...

1990 Map of Letterbox Hill

Name: 1990 Topographic Map of Letterbox Hill
Creator: U.S. Geological Survey
Published: 1990
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1990

About this map

Modoc National Forest dominates this landscape in Lassen County, California, showing a region defined by high-country water management and timberland. In the late 20th century, a complex network of man-made water features such as Myers Reservoir, Cary Reservoir, Whit Flat Reservoir, and McClelland Reservoir suggest a land carefully managed for livestock or local irrigation. The southern portion of the map transitions into the State Game Refuge, encompassing large topographical features like Hayden Hill and Silva Flat.

Tracing the historical routes across this terrain reveals Stonebreaker Crossing along the East Fork Juniper Creek. The physical geography is marked by distinctive elevations including Manzanita Hill, Lonkey Hill, and the map's namesake Letterbox Hill near Letterbox Canyon. These landmarks, along with smaller springs like Deer Spring and Myer Spring, provide critical points of reference for researchers studying the land use and hydrology of this part of northern California before the turn of the millennium.