The lake covers 3,244 acres (13.13 km2) at an elevation of 950 feet (290 m) and is fed by three small creeks.

With a volume of 705,000 acre-feet (870,000,000 m3) and depth of 325 feet (99 m), Omak is the largest saline lake in Washington.

[2] Omak Lake occupies a former channel of the Columbia River.

[3] The Okanagan people once believed that Omak Lake was inhabited by spirits, and avoided the area.

[3] This Okanogan County, Washington state location article is a stub.