The Bullwhacker Dog Watershed, located in southeastern Montana and northwestern Wyoming, has a total land area of approximately 1,244 square miles. The hydrology of the watershed is dominated by the Tongue River, which flows through the area and provides a source of surface water for the region. The specific snowpack in the Bullwhacker Dog Watershed varies depending on the elevation and topography of the area. However, the snowpack typically reaches its peak in March and April. Surface water in the watershed is primarily used for irrigation and recreational purposes. The primary reservoir in the area is the Tongue River Reservoir, which was created in 1952 and has a storage capacity of approximately 200,000 acre-feet. Climatic trends in the area indicate that temperatures have been rising over the past several decades, leading to increased evapotranspiration rates and changes in precipitation patterns. These trends have had significant impacts on the availability of water resources in the region.