The cow watershed (HUC 11030011) covers an area of approximately 303 square miles in Montana. The hydrology of the watershed is primarily influenced by the snowpack, which accumulates during the winter months and melts during the spring and summer months. The surface water in the watershed is dominated by the Cow Creek, which flows into the Clark Fork River. Reservoir constituents in the watershed include various fish species such as rainbow trout and bull trout, as well as riparian vegetation. Interesting climatic facts and trends in the watershed include an average annual precipitation of 22 inches and an average annual temperature of 44 degrees Fahrenheit. However, recent trends show that the area has been experiencing warmer temperatures and a decrease in snowpack, which may have implications for the future of the watershed.