2017 Map of Cochran Reservoir

About this map

Cochran Reservoir anchors this landscape in Carter County, Montana, where the hydrology of the Willow Creek system branches across open rangeland. The drainage patterns are defined by the N Fork Willow Cr, Middle Fork Willow Cr, and S Fork Willow Cr, creating a complex network of seasonal watercourses and topographic depressions. Named landforms such as Zimmerman Draw, Nelson Draw, and Torgerson Draw provide evidence of historical land use and family-named landmarks in this corner of the Big Sky State. The terrain is notably etched by the Nelson Washout, illustrating the erosive character of the local geography. Transportation is limited to functional backcountry routes like Ridge Rd and Pilster Dr, which follow the section lines and natural contours of the high plains, reflecting the area's sparse settlement and focus on large-scale grazing operations.