Hewitt Lake National Wildlife Refuge, Nature reserve in Phillips County, Montana, US.

Hewitt Lake National Wildlife Refuge is a 550-hectare nature reserve in Phillips County featuring mixed-grass prairie and a seasonal wetland created by an earthen dam at its center. Rolling plains surround the water, creating open grassland with low relief across the property.

The United States Fish and Wildlife Service established this refuge in 1938 as part of a nationwide effort to protect essential wetland habitats. Its creation reflected growing concern about threats to these critical ecosystems from agricultural expansion.

This satellite location of Bowdoin National Wildlife Refuge participates in regional conservation efforts and education. Visitors experience the direct link between habitat protection and the birds that depend on these spaces.

The refuge is unstaffed and managed from Bowdoin National Wildlife Refuge, so contact that office for information before visiting. Part of the land is a U.S. Government holding and the rest is an easement across private landowner property, so stay on public portions. The site lies in a valley in Phillips County, about 669 metres above sea level.

The lake naturally dries up by late summer each year, creating shifting wetland environments. This seasonal drying pattern attracts thousands of migratory birds passing through on their routes.