1964 Map of Granite Pass

About this map

Granite Pass serves as a critical high-altitude corridor along the divide between Idaho and Montana in this mid-1960s topographic study. The landscape is defined by the boundary of Lolo National Forest and Clearwater National Forest, where a network of historic travel routes like the Idaho Montana State Line (Pack) Trail and various pack trails traverse the ridgelines. High points such as Granite Peak and Pilot Knob overlook the headwaters of numerous drainages, including the Crooked Fork and Boulder Creek. This map reveals a wilderness managed for forestry and fire observation, evidenced by the Lookout Tower situated near BM Hill. The presence of a Jeep Trail and several pack trails highlights the area's transition from early foot and animal transit to seasonal vehicular access for forest management and recreation.