Browns Park National Wildlife Refuge lies in a remote park, or mountain valley formed by the Green River in northwestern Colorado. The refuge is surrounded by great escarpments of rock and a forest of pinion and juniper. Much of the surrounding land is included in two Bureau of Land Management Wilderness Study Areas. Down on the refuge the terrain is rolling and open. The Green River divides the refuge in two. The refuge is comprised of five broad habitats: semidesert shrubland, grassland, marsh, riparian forest, and pinyon-juniper forest. Over 300 species of terrestrial wildlife use the refuge, making the diversity very valuable for wildlife.