The Little Bighorn Watershed (HUC 10080016) covers a land area of 8,000 square miles and is located in Montana and Wyoming. The hydrology of the area is driven by precipitation, which mostly occurs in the form of snow during the winter months. The snowpack is an important factor in determining the amount of surface water available during the spring and summer months. The watershed contains several reservoirs, including the Yellowtail Dam and Reservoir, which supply water for irrigation, municipal, and industrial use. The reservoirs also provide recreational opportunities such as fishing and boating. Interesting climatic facts include that the area experiences both cold winters and hot summers, with precipitation mainly occurring during the spring and summer months. Trends show that the area has experienced a decrease in snowpack in recent years, which could have long-term impacts on water availability and management.