Emerald Lake (Washington)
Emerald Lake is a freshwater lake located on the western region of the Alpine Lakes Wilderness, in King County, Washington. It is one of three lakes that are connected by stream which together form the Neckelace Valley Lakes. Emerald Lake and its surrounding lakes and peaks are a popular area for hiking, swimming, and fishing cutthroat trout and rainbow trout. Self-issued Alpine Lake Wilderness permit required for transit within the Necklace Valley area.