Lake Sakakawea watershed, also known as HUC 10110101, covers an area of approximately 29,000 square miles in North Dakota, USA. The hydrology of the region is dominated by the Missouri River, which is the main source of surface water. The watershed receives an average of 20-25 inches of precipitation annually and is characterized by extreme temperatures ranging from -40°F to 100°F. The specific snowpack in the region varies depending on the elevation, with higher elevations receiving greater snowfall. The main reservoir constituents include sediment, nitrogen, and phosphorus, which can have a significant impact on water quality. Interesting climatic facts and trends in the Lake Sakakawea watershed include an increase in extreme weather events, such as floods and droughts, and a rise in average temperatures over the past few decades. These changes have had a significant impact on the hydrology and ecology of the region. The management of water resources in the Lake Sakakawea watershed is critical to maintain the ecological health of the region and provide essential services to nearby communities.