2020 Map of Acorn Flats

About this map

Acorn Flats straddles the boundary between Rosebud and Garfield counties, presenting a classic Big Sky landscape defined by deep drainages and remote ranching access. The northern portion of the map is dominated by the watershed of Heist Cr and Little Porcupine Cr, while the central terrain is deeply incised by Devils Canyon and Germa Coulee. This 2020 survey illustrates the modern persistence of traditional land use, where named access points like Miller Ranch Ln and Acorn Flats Rd provide the only infrastructure through the complex topography. Water remains the critical anchor for life here, marked by the presence of Wilkes Spring and Acorn Cr. The land's character is shaped by its drainage patterns, from the northern flats down through the Hanson Coulee in the south, reflecting a vast, open rangeland where cattle ranching and seasonal waterways define the local geography.