Browns Park National Wildlife Refuge preserves 13,450 acres along the Green River in northwestern Colorado, where bottomland, marsh, grassland, and rocky slopes support a rich variety of wildlife. Established in 1965 after land purchases approved in 1963, it was created to maintain waterfowl habitat after Flaming Gorge Dam ended the annual floods that had formed important marshes. Water is now pumped and diverted to sustain nine marsh units. About 200 bird species use the refuge, including Great Basin Canada geese, ducks, bald eagles, golden eagles, and peregrine falcons, while deer, elk, moose, river otter, and other mammals also appear. The site also includes Fort Davy Crockett, built in 1837 during the fur-trade era.