Garrison Dam National Fish Hatchery is e. of the powerhouse at 530 Fish Hatchery Rd. It stands on the banks of the Missouri River just south of Lake Sakakawea. The hatchery is the source of millions of fish that swim in state waters. From April through June, eggs spawned from wild pike and walleye are brought here to be incubated. Wild adult pallid sturgeon, a species native to the Missouri River, spawn from mid-April through June. In October, eggs are collected from migrating chinook salmon that swim up the fish ladder or hatchery spawning channel. The visitor center has 400-gallon aquariums displaying native fish, and there is a hiking trail on the grounds.