Minidoka National Wildlife Refuge is located on the Snake River Plain in south-central Idaho, 12 miles northeast of Rupert. It includes about 80 miles of shoreline around Lake Walcott, from Minidoka Dam upstream about 25 miles.
About half of the refuge’s 20,699 acres is open water and wetlands. In this arid landscape, these resources serve as an oasis drawing numerous wildlife species from miles around. Many species use the bulrush and cattail habitat that lines the lake’s small bays. Others use the willows, cottonwoods and other trees growing near shorelines. The rest of the refuge is low, rolling uplands covered by sagebrush, grasses and isolated juniper patches amongst scattered outcrops of basalt.
The climate is semi-arid with about 11 inches of precipitation a year, much of it falling as snow during the winter. Summers are hot and dry with highly variable rain during thunderstorms. Winters are generally moderate but windy. The elevation is about 4200 feet