Airport Boulder

description

Airport Boulder, at Martha Lake Airport Park in Martha Lake, said to be “one of the largest glacial erratic boulders in urban King, Snohomish, and Pierce counties”, is approximately 20 feet (6.1 m) long on its longest axis and about twice a man’s height. The erratic is composed of greenstone, and has long been used for bouldering (rock climbing), with at least four ascent routes.

glacial erratic of

Martha Lake Airport Park

maps

nearby erratic

Lake Stevens Erratic

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Columbia County — Thumbnail History (historylink.org) Columbia County, in southeastern Washington, has a population of 4,064 (in 2000), making it one of the more sparsely populated of Washington’s 39 counties. At 868.8 square miles, it is the ninth-smallest county in the state.

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wikipedia

https://en.wikipedia.org/wiki/Glacial_erratic_boulders_of_the_Puget_Sound_region