1964 Map of Mystery Cave

About this map

The Pryor Mountains define this landscape along the border of Montana and Wyoming, where the high-altitude terrain is marked by a unique concentration of subterranean features. This 1964 survey, with purple-ink revisions from 1978, illustrates the complex topography of Bighorn Canyon and the surrounding wilderness. The map highlights the Pryor Mountains National Wild Horse Range, a significant administrative boundary that overlaps with the Custer National Forest and the Bighorn Canyon National Recreation Area. For those studying the geological or recreational history of the region, the map identifies specific landmarks like Mystery Cave, Royce Cave, and the Four Eared Bat Cave. To the southeast, the Bighorn River flows into Bighorn Lake within the Crow Indian Res, where the canyon floor meets the rising peaks of Yellow Hill.