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Ana River
The Ana River is a short spring-fed river in south-central Oregon. It is on the northwestern edge of the Great Basin drainage. It flows from springs at the foot of Winter Ridge through high desert, range, and wetlands before emptying into Summer Lake. For most of its course, the Ana River flows through the Summer Lake Wildlife Area, which is maintained by the Oregon Department of Fish and Wildlife. The river provides habitat for many mammal and bird species, as well as several fish species, including the rare Summer Lake Tui chub. The largest hybrid striped bass ever caught in Oregon was taken from Ana Reservoir in 2009.
==Watershed==
The Ana River is located a few miles east of the small unincorporated community of Summer Lake, Oregon. The river flows for through the high desert country of Lake County, Oregon, before draining into Summer Lake.〔La Rue, E. C., F. F. Henshaw, and E. A. Porter, (Water Supply Papers 290 ), ''Surface Water Supply of the United States 1910'' (Part X. The Great Basin), United States Geological Survey, United States Department of Interior, Government Printing Office, Washington, D.C., 1912, p. 218.〕〔Anderson, E. William, Michael M. Borman, and William C. Krueger, ("Vegetation" ), "High Desert Ecological Province", ''The Ecological Provinces of Oregon'', Oregon State University, 1997.〕〔Witty, Jim, (“Ana River” ), ''The Bulletin'', Bend Oregon, 5 January 2007.〕 The river was named by W. H. Byars, Oregon’s surveyor general from 1890 to 1894, who surveyed the land around Summer Lake. Byars named the river after his daughter.〔McArthur, Lewis A. and Lewis L. McArthur, "Ana River", ''Oregon Geographic Names'' (Seventh Edition), Oregon Historical Society Press, Portland, Oregon, 2003, p. 23.〕
The Ana River watershed is very small. As a result, runoff from snow melt and overland drainage is minimal except during major thunderstorms that produce direct precipitation on areas immediately adjacent to the river. The river is fed by a number of small springs that produce a relatively constant year-round flow of to . The spring water is a constant . This helps the reservoir and river maintain a relatively mild water temperature, even during the cold winter months.〔〔("Habitat Types" ) (PDF), ''Summer Lake Wildlife Management Plan'', Oregon Department of Fish and Wildlife, Salem, Oregon, October 2007, pp. 15–17.〕
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