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. The glacier's cold, silt-filled melt water is what makes the lake a spectacular turquoise green color making this a prime example of a Rock flour lake.
***** Update about the washout .. The trail was hiked on Nov 20, and not sure when the wash out was fixed, but as of Nov 20th, FS63 is drivable. The parking lot is accessible. *****
Wikipedia https://en.wikipedia.org/wiki/Blanca_Lake
Coordinates 47°56'25.892" N -121°20'25.942" E