K'etnu Ka'a Bena is a lake located in Kenai Peninsula County, Alaska. It appears on the Tyonek A-4 SE USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 184.42 feet (56.21 m) above sea level. The nearest populated place is Old Tyonek (historical), approximately 1.4 miles to the WSW.