Grass Lake National Wildlife Refuge

Grass Lake National Wildlife Refuge (formerly Halfbreed Lake National Wildlife Refuge^[2]) is in the central section of the U.S. state of Montana and is an integral part of the Charles M. Russell National Wildlife Refuge Complex, managed from the Charles M. Russell National Wildlife Refuge.^[3][4] This refuge provides nesting habitat for migratory bird species.^[5]

Grass Lake National Wildlife Refuge
IUCN category IV (habitat/species management area)
Location	Stillwater County, Montana, USA
Nearest city	Billings, MT
Coordinates	45°56′39″N 109°06′42″W[1]
Area	4,318 acres (1,747 ha)
Established	1987
Governing body	U.S. Fish and Wildlife Service
Website	Grass Lake National Wildlife Refuge