1959 Map of Frank Island

About this map

Yellowstone Lake dominates this mid-century survey, its expansive waters defining the geography of the central Yellowstone National Park plateau. The map captures the complex shoreline of the South Arm and West Thumb, where the lake meets the towering Continental Divide and Flat Mountain. This era of park management is reflected in the remote infrastructure necessary for wilderness oversight, specifically the Park Pt Patrol Cabin on the eastern shore and the Heart Lake Patrol Cabin near the southwestern corner.