Lake Nighthorse is a man-made reservoir located in La Plata County, Colorado. The lake was created in 2009 as a water storage facility to provide year-round water supply to the nearby Durango city. The hydrology of the lake is primarily dependent on snowpack and surface flow from the Animas River, which contributes to about 90% of the water volume. The lake's water is also supplied from the Florida River and other tributaries. The agricultural and recreational uses of Lake Nighthorse are limited, and the lake is primarily used for fishing, boating, and swimming. The lake is stocked with several fish species, including kokanee salmon, rainbow trout, and smallmouth bass. The lake has become a popular destination for locals and visitors, providing an excellent opportunity for outdoor activities in a beautiful setting.