2017 Map of Cowan Reservoir

About this map

Rocky Boy West and Boneau represent the primary centers of settlement on this high plains landscape straddling the line between Hill County and Chouteau County. The terrain is defined by a series of intermittent drainage systems, most notably the winding paths of Big Sandy Creek, Boxelder Creek, and Sage Creek. The local topography is punctuated by the prominent elevation of Square Butte, providing a landmark amidst the broad coulees and draws like Sand Coulee. Water management is central to the area's geography, evidenced by the Cowan Reservoir and Dry Fork Reservoir. A network of local routes, including Route 6, Boneau Road, and Rocky Boy Road, connects these remote reaches, tracing the contours of the land around seasonal flows like Duck Creek and Camp Creek.