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

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