Lives less than a mile from the July 3rd hash location for the Seattle graticule. Is probably older than you.
Geohashes
2008-07-16 47 -122 Harlequin, his buddy Kevin, and I made the trek to Vashon Island. While the Google satelite photo showed ample beach, there was none. We must assume that the photo was taken at a very low tide and our visit was at high tide. The exact point was under about 15 feet of water and about 150 yards offshore - so we got as close as we could. My GPS showed: 47 degrees 27.48 minutes North, 122 degrees 26.43 minutes West, and a distance to the mark of .09 miles.
