About the NWRS
The National Wildlife Refuge System, within the U.S. Fish and Wildlife Service, manages a national network of lands and waters set aside to conserve America’s fish, wildlife, and plants.
Learn more about the NWRS
A Migratory Bird Haven
Grass Lake NWR is one of the most productive migratory bird areas in central Montana. The refuge is used by a diversity of migratory birds, both during migration and for nesting. For this reason, the refuge is closed to all public use.