Malheur Lake is one of the lakes in the Malheur National Wildlife Refuge in Harney County in the U.S. state of Oregon. Located about 18 miles (29 km) southeast of Burns, the lake is a marsh fed by the Donner und Blitzen River from the south and the Silvies River from the north. Malheur Lake periodically overflows into Mud Lake to the west and thence to Harney Lake, the sink of Harney Basin.
The western area of Malheur Lake consists of ponds separated by small islands and peninsulas. The lake's central and eastern sections are more open. The generally shallow water is suitable habitat for migratory birds, waterfowl, and aquatic plants.
As is typical of Great Basin lakes, Malheur Lake's surface area changes dramatically with the local weather, climate, and season because the lake is in a…