2020 Map of Willow Creek Reservoir

About this map

Willow Creek Reservoir dominates this landscape on the border of Gallatin and Madison Counties, capturing the flow of Willow Cr and Norwegian Cr in a high-elevation basin. The surrounding terrain is marked by a complex system of drainage and irrigation, most notably the Roebert and Warren Ditch, which traverses the slopes west of the reservoir. This network of small streams, including Dry Hollow Cr and Spring Cr, illustrates the critical role of water management in this portion of Montana. Historically significant routes like the Old Yellowstone Trl cut across the northern sections, tracing an era of early transcontinental travel. Modern access is maintained via Harrison Lake Rd, while the township and range lines of the Public Land Survey System define the administrative structure of these ranchlands and watersheds.