
The National Bison Range Complex includes four National Wildlife Refuges and the Northwest Montana Wetland Management District, and is located in the northwestern region of Montana in the northwestern United States.

Lost Trail National Wildlife Refuge is a 8,834-acre (3,575 ha) National Wildlife Refuge of the United States located in Montana. Established in 1999, it is one of the newest National Wildlife Refuges in the U.S. and is managed by the U.S. Fish and Wildlife Service, an agency of the U.S. Department of the Interior. The refuge was originally a sprawling horse and cattle ranch dating back to the late 19th century and was known as the Lost Trail Ranch. The refuge consists of prairie and wetlands, and has a wide diversity of plant and animal species, including over 100 species of birds such as canada geese, sandhill crane, wood duck, green-winged teals and herons. Several species of grouse also inhabit the refuge. Predatory bird species such as the great horned owl and red-tailed hawk are also found here.

The National Bison Range (NBR) is a National Wildlife Refuge located in western Montana established in 1908 to provide a sanctuary for the American bison. The NBR is one of the oldest National Wildlife Refuges in the United States. The size of the bison herd at the NBR is between 350 and 500 individuals. The initial herd of American bison was provided by organizations such as the American Bison Society, and today the refuge serves as the central point for bison research in the United States.

Ninepipe National Wildlife Refuge is a 4,027-acre (1,630 ha) National Wildlife Refuge and unit of the National Bison Range Complex, located in Lake County, Montana.

The Northwest Montana Wetland Management District is located in the U.S. state of Montana and is an integral part of the National Bison Range Complex along with four other wildlife refuges and the National Bison Range. The district comprises numerous small wetland environments set aside primarily to protect areas for waterfowl. The district comprises 14 separate Waterfowl Production Areas (WPA)'s totalling 8,452 acres (3,420 ha) and one 6,300 acres (2,500 ha) conservation easement along the north shores of Flathead Lake. Some of the land is located on the Flathead Indian Reservation and they continue to have claim over the land provided they assist in maintaining the resource. The Northwest Montana Wetland Management District is administered by the U.S. Fish and Wildlife Service, an agency within the U.S. Department of the Interior. The individual lands were acquired beginning in 1970 by purchasing plots from willing landowners, and an ongoing effort to continue to increase area.

Pablo National Wildlife Refuge is a National Wildlife Refuge of the United States located in northwestern Montana. It is a unit of the National Bison Range Complex of refuges. It is within the Flathead Indian Reservation, about 2 mi (3.2 km) south of Polson.

Swan River National Wildlife Refuge is a 1,778-acre (720 ha) National Wildlife Refuge in Lake County of northwestern Montana. It is a unit of the National Bison Range Complex.