[2][3] It has two outflows; the Black River, which drains southwest into the Chehalis River and thence to Gray's Harbor and the Pacific Ocean, and Percival Creek, which drains northeast into Capitol Lake and thence into Puget Sound.

Black Lake was so named on account of the dark character of its water.

[4] The nearby community of Belmore lies east of the lake.

During the 1900,[5] 1910,[6] 1920,[7] and 1940[8] United States censuses, there was a Black Lake precinct in Thurston county.

This Thurston County, Washington state location article is a stub.