1965 Map of Lemhi Pass

About this map

The Continental Divide serves as the primary spine of this mid-1960s survey, marking the high-altitude border between Idaho and Montana. This rugged corridor is defined by the historic Lemhi Pass, a critical crossing point between the Salmon National Forest and the Beaverhead National Forest. The landscape reveals a history of early mining and recreation, notably at the Sacajawea Memorial Camp and the Copper Queen Mine. Small outposts like Agency and the Selway Ranch are connected by a network of primitive tracks, labeled as Jeep Trails, which navigate the headwaters of numerous mountain drainages. The map details a complex hydrographic system where North Frying Pan Creek and South Frying Pan Creek flow toward the Pacific, while eastern slopes feed into Shearer Creek and Bear Creek. Researchers will find numerous unnamed Mine and Prospects markers scattered across the ridges, indicating the intense mineral exploration that characterized the region’s development.