The Blanchard Watershed covers an area of approximately 2,309 square miles in northwestern Montana. The watershed is characterized by mountainous terrain, with elevations ranging from 1,500 to 10,000 feet. The hydrology of the watershed is heavily influenced by snowfall, with the majority of the annual precipitation falling in the form of snow. The snowpack is critical to the surface water supply, as it provides the majority of the runoff in the spring and summer months. The watershed is also home to several large reservoirs, including Hungry Horse Reservoir and Lake Koocanusa, which are used for hydroelectric power generation and irrigation purposes. The reservoirs are fed by several major rivers, including the Flathead, Kootenai, and Clark Fork rivers. The Blanchard Watershed is subject to a changing climate, with increasing temperatures and decreasing snowpack in recent years. These trends are likely to have significant impacts on the hydrology and ecology of the watershed in the coming decades.