2024 Map of Thebes

About this map

Thebes Lake sits at the heart of this rangeland landscape in Rosebud County, where the terrain is defined by the ephemeral drainage of West Blacktail Creek. The map documents a sparsely settled portion of eastern Montana, where the primary infrastructure consists of long-distance routes like Cohagen Rd and Big Porcupine Rd that follow the natural contours of the coulees and ridges. The presence of Petroleum Rd suggests the historical importance of resource extraction and maintenance access in this isolated territory. This contemporary survey by the U.S. Geological Survey provides a clear view of the Public Land Survey System grid, including townships t10n r36e, t10n r37e, and t9n r36e, which continue to organize the ranching and energy-producing lands of the High Plains.