Loading map...

1969 Map of Grandmother Mtn

Name: 1969 Topographic Map of Grandmother Mtn
Creator: U.S. Geological Survey
Published: 1973
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1973

About this map

Grandmother Mtn and Grandfather Mtn anchor this high-elevation landscape within the St Joe National Forest as it was surveyed in the late 1960s. The terrain is defined by a dense network of drainage systems, including Marble Creek, Hobo Creek, and Freezeout Creek, which carve deep into the Idaho backcountry. Evidence of the region’s mineral history is visible in names like Gold Creek and Placer Creek in the southwest, suggesting the historical prospecting that once drew miners to these remote ridges.

Transportation through this wilderness is limited to a skeletal system of Pack Trails and Jeep Trails, highlighting the isolation of the area. Significant landmarks such as Marks Butte and Freezeout Ridge provide topographical context, while water sources like Grandmother Spring and Squaw Spring mark critical points for travelers and local fauna. The map captures a moment when the forest remained largely roadless, accessible primarily to those traversing the rugged paths of Cornwall Point and Hobo Hill.