Opal Lake
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| Opal Lake | |
|---|---|
  Opal Lake  Opal Lake | |
| Location | King County, Washington, United States |
| Coordinates | 47°34′30″N 121°15′06″W / 47.5750838°N 121.2517503°W |
| Basin countries | United States |
| Surface area | 1 acre (0.0040 km2)[1] |
| Surface elevation | 4,790 ft (1,460 m)[2] |
Opal Lake, also known as Necklace Valley Lake 3, is a freshwater lake located on the western region of the Alpine Lakes Wilderness, in King County, Washington. The lake is connected by stream to Emerald Lake and Jade Lake, which form together the Neckelace Valley Lakes. Opal Lake and its surrounding lakes and peaks are a popular area for hiking, swimming, and fishing Rainbow trout.[1] Self-issued Alpine Lake Wilderness permit required for transit within the Necklace Valley area.[3]
Opal Lake is one of the Necklace Valley Lakes, which includes nearby Jade Lake and Emerald Lake. The lakes form a topographic sequence that reminds of a necklace, hence the name makes reference to a necklace strung with streams in between.[4] The Necklace Valley was the site of mining, camping sites on Opal Lake and surrounding sites still contain mining instruments and remnants of mining activity.[3]
