On July 11, 2012 - Find #1370 - approximately two years and one week after visiting Groundspeak HQ and finding the Project APE geocache (since archived), we finally made the trek to Portland, OR and made the find on the Original Stash Tribute Plaque.
Although I should have expected it, there wasn't much of a challenge to finding the cache plaque, it was pretty much out in the open. Not that i'm complaining; I somehow expected it to be off in the woods somewhere, not at the side of the road.
There was also a few other interesting caches around. We grabbed a few of them, but the day was so hot (our car registered 34C) that we decided to head back to Portland and go visit the zoo. Nonetheless we still ended up getting quite a few caches that day.