The Patuxent Research Refuge is a 12,841-acre wildlife preserve directly to the West of Severn. The site is managed by the U.S. Fish and Wildlife Service. The refuge is divided into three areas: The North Tract is the area reserved for fishing and hunting the managed wildlife populations. The Central Tract is where the research biologists have their laboratories and offices. And the South Tract is is where the visitor center is located, as well as many hiking trials to be explored. Keep an eye out for special events at the refuge throughout the year.