Glacial erratic boulders of King County, Washington

[2] According to Nick Zentner of Central Washington University Department of Geological Sciences, "Canadian rocks [are] strewn all over the Puget lowland, stretching from the Olympic Peninsula clear over to the Cascade Range.

"[3] Erratics can be found at altitudes up to about 1,300–1,600 feet (400–490 m) in the Enumclaw area,[4] along with kames, drumlins,[5] and perhaps also the unique Mima mounds.

[3][8] Boulders greater than 3 meters in diameter are "rare" in the Vashon till,[2] but can be found, as seen in the table below.

47°35′31.1″N 121°59′27.0″W / 47.591972°N 121.990833°W / 47.591972; -121.990833 (Beaver Lake Preserve erratics) 47°43.542′N 121°59.189′W / 47.725700°N 121.986483°W / 47.725700; -121.986483 (Big Rock (Duvall)) 47°36′00″N 122°02′49″W / 47.600°N 122.0469°W / 47.600; -122.0469 (Big Rock Park erratic) Saved from destruction by sit-in conducted by Cascadia College environmental politics students, and relocated away from construction site.

A legend says that a hero named Sta'kub could throw a giant cedar and hazel branch dragnet over the rock while standing at the beach.