The Big Muddy Watershed, also known as HUC 10060006, covers over 27,000 square miles and includes parts of Montana, Wyoming, South Dakota, North Dakota, and Nebraska. The watershed is characterized by varied hydrology, ranging from small streams to large rivers. The area receives moderate to high snowfall, with some regions experiencing over 100 inches of snow per year. Snowpack melts in the spring, contributing to surface water in the watershed. The area is home to several large reservoirs, including Lake Sakakawea and Fort Peck Lake, which play a crucial role in irrigation, flood control, and recreation. Climate trends in the region have shown a decrease in snowpack and an increase in temperature, leading to longer growing seasons and increased evaporation rates. The Big Muddy Watershed is a unique and diverse ecosystem with significant ecological, economic, and cultural value.