Established in 1939, Creston National Fish Hatchery in northwest Montana was the first and only hatchery to raise endangered bull trout.

Ennis National Fish Hatchery is the largest facility in the U.S. Fish and Wildlife Service's National Broodstock Program. It is one of only two rainbow trout broodstock hatcheries in the National Fish Hatchery System. The hatchery currently raise seven different strains of rainbow trout.