The Rocky Mountain Arsenal National Wildlife Refuge is a restored wildlife habitat near Denver, offering extensive trails and abundant opportunities to see native and migratory animals within a unique urban conservation area.
Located just northeast of Denver, Colorado, the Rocky Mountain Arsenal National Wildlife Refuge spans reclaimed land once part of a chemical weapons manufacturing site. Transformed over decades, the refuge now covers over 15,000 acres of prairie, wetlands, and ponds, providing critical habitat for more than 330 species of wildlife, including bison, deer, coyotes, and over 190 bird species. The area plays an important ecological role as one of the largest urban refuges in the United States. Visitors can explore more than 20 miles of multi-use trails for hiking, biking, and wildlife observation, with seasonal guided tours and educational programs available. Significant landmarks include the bison herd enclosures, the waterfowl viewing areas, and several historic structures reminding visitors of the site's former military use. The refuge’s proximity to Denver offers a unique opportunity to experience nature, wildlife photography, and interpretive activities without traveling far from the city. It is managed by the U.S. Fish and Wildlife Service, emphasizing habitat restoration, public education, and coexistence between urban development and wildlife conservation.
Bison Herd Viewing Areas
Diverse Wetland Ecosystems with Migratory Birds
Historic Military Facilities Preserved
Multiple Trailheads Providing Easy Access from Denver
A large fenced area where visitors can observe a healthy herd of plains bison roaming freely in a prairie environment.
Extensive wetland habitats attract hundreds of species of migratory and resident birds, with observation platforms and viewing stations.
Remnants of the former chemical weapons manufacturing site preserved to educate visitors on the site's military history before refuge designation.