The listed coordinates put you in a parking lot near Waypoint 1.
Use the information gathered here to calculate the location of the
final cache, which is not within walking distance.
Waypoint 1: N 47° 37.850 W 122° 10.866
Summer Pudding + October Bronze + Sage + Aubergine – Navy3 =
YIP
Yellow Diapie + Peek-A-Boo Purple + Retro Red – Eggshell
Adventure = MUD
Final Cache: N 47° 31.YIP W 122° 10.MUD
Checksum (last 3 digits): N = 12 W = 15
Cache is a small ammo box, and the location should be fairly
obvious. There’s no need to trample anything (so don’t be messing
with my ferns!).
No, you can’t see my house from here, it's on the other side of
the greenbelt. So no need to be bashful, come on by!
Trivia note: The original palette for this cache included
Flying Dog (sadly, discontinued), and I had a bonus trivia question
that asked which geocacher's name was the same as the color I
painted my bedroom (it's true!).