Keechelus Lake (/ˈkɛtʃələs/) is a lake and reservoir in the northwest United States, near Hyak in Kittitas County, Washington. Approximately fifty miles (80 km) southeast of Seattle and a few miles southeast of Snoqualmie Pass, it is the source of the Yakima River. Keechelus Lake is part of the Columbia River basin, being the source of the Yakima River, which is tributary to the Columbia River. The name Keechelus comes from a Native American term meaning "few fish", in contrast to Kachess Lake, whose name means "more fish".