2020 Map of Mosby

About this map

The Musselshell River winds through this central Montana landscape, creating a serpentine boundary between Petroleum and Garfield counties. Near the northern edge, the settlement of Mosby sits at a strategic crossing point where the Mosby Bridge spans the water. The terrain is defined by a complex network of drainages, including Hughes Coulee, Anderson Coulee, and Circle Bar Coulee, which cut into the high ground. Ranching history is evident through family-named landmarks such as Hill Ranch and Maxwell Ranch. Water management is critical in this arid environment, marked by features like the Shaw Reservoir and the confluence where Flatwillow Cr feeds into the main river channel. Local routes like Melstone Rd and the Old Melstone Rd track the high ridges above the river valley.