Oatka Creek, NY

Oatka Creek is the third longest tributary of the Genesee River, located entirely in the Western New York region of the U.S. state of New York. From southern Wyoming County, it flows 58 miles (93 km) to the Genesee near Scottsville, draining an area of 215 square miles (560 km2) that includes all or part of 23 towns and villages in Wyoming, Genesee, Livingston and Monroe counties as well. Its name means "leaving the highlands" or "approaching an opening" in Seneca.

It remains an important regional resource, used for water supply and recreational purposes, and actively protected to assure water quality. It is a popular trout stream, stocked from the oldest fish hatchery in the Western Hemisphere near its mouth. A dam in Le Roy makes the section below it a losing stream, dry during the warm months of the year as the stream flows through subterranean channels.