The Black Rocky watershed (HUC 04110001) is located in western Montana and covers an area of approximately 2,500 square miles. The watershed is characterized by its high elevation and steep terrain, which contributes to its unique hydrology. The area receives a significant amount of snowpack each year, which feeds into the watershed's numerous streams and rivers. Surface water quality in the watershed is generally good, with low levels of pollutants observed in most areas. The watershed contains several reservoirs, which are used for hydroelectric power generation and recreational activities. Interesting climatic facts include the region's high elevation and susceptibility to extreme weather events, such as heavy snowfall and flash flooding. Trends in the region suggest that warming temperatures may have an impact on snowpack and water availability in the coming years.