Unincorporated community in Washington, United States
Grotto is a small unincorporated community in King County, Washington, United States. It is located on U.S. Route 2 west of Stevens Pass in the Cascade Mountains, near the town of Skykomish. Grotto is known for its scenic mountain environment.
A post office called Grotto was established in 1910.[2] The community was named for gorges near the original town site.[3]
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