2015 Map of Fourmile Knoll

About this map

California-Oregon Trl cuts across the northern reaches of this Sweetwater County landscape, preserving the physical alignment of one of the most significant migration corridors in American history. The terrain is defined by wide open flats and subtle rises, most notably the prominent Fourmile Knoll and the low-lying Sublettes Flat to the northeast. While contemporary infrastructure is limited to routes like Cr-49, the map reveals a land fundamentally shaped by the drainage patterns of Simpson Gulch. This 2015 survey provides a modern look at a region where the historic trail remains a primary landmark, illustrating how the high desert topography influenced the paths of 19th-century travelers through Wyoming.