Blanca Lake is located in the Henry M. Jackson Wilderness Area in the Cascade Mountains of the U.S. state of Washington.

Blanca Lake sits in a basin surrounded by the peaks of Monte Cristo, Kyes, and Columbia.

The lake is fed by the Columbia Glacier to the northwest and is drained by Troublesome Creek, a tributary of the North Fork Skykomish River.

From the ridge-top, the trail continues through sub-alpine meadows until you reach Virgin Lake at 4,600 ft (1,402 m).

Due to its elevation, and the heavy snowpack of the Pacific Northwest, Blanca Lake is typically only easily accessible from June until the snows of October or November.