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Boundary Dam

This 24-mile round trip rewards you with a look at the third longest limestone cavern in Washington and a visit to the adjacent Boundary Dam.

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Along the west bank of Z Canyon, 18 feet wide and 400 feet deep is Gardiner Cave, in Crawford State Park, a 49-acre, forested, day-use park. In the cave are stalactites and stalagmites, rimstone pools, flow stone, and other beautiful formations. Two large fluted pillars, dividing the main passageway, display all the colors of the spectrum, with violet and pink predominating. Numerous nacreous pillows rise from a few inches to...

Learn more about Gardiner Caves