1964 Map of Tenmile Lake

About this map

The high alpine crest of the Bitterroot Mountains serves as the primary character of this 1964 survey, defining the state boundary between Idaho and Montana. This high-altitude landscape is part of the Selway-Bitterroot Wilderness, where the Nez Perce National Forest to the west meets the Bitterroot National Forest to the east. Remote water bodies like Tenmile Lake, Twelvemile Lake, and Blodgett Lake are tucked into glacial basins beneath steep ridges. Evidence of significant geological activity is visible through labels for the Ohio Slide and Poverty Slide near the Twelvemile Creek drainage. Human infrastructure is limited to the Lost Horse Guard Station, a Campground, and a high-elevation Pack Trail that follows the Moose Creek drainage, illustrating the primitive state of this wilderness area prior to modern development.