hello there! I finally got off of my duff and planted my first letterbox.
Here is the info:

Schmitz Park, Seattle, Washington

Directions: From I-5 take the West Seattle Bridge to SW Admiral Way. Follow
Admiral Way uphill, through the business district, and downhill to SW Stevens
(watch for the "rainbow" park sign on the left, just before Admiral Way
crosses a bridge over the ravine). Turn left at the sign and keep right,
following the road down to the parking area. Park in the parking lot.

Difficulty: easy

Clues: From the parking lot, start at the sign that says "Leash Pets and
Obey Scoop Laws".
Take the main path to the right past a rock commemorating the bicentennial
planting of fir trees.
You'll come to a fork in the path, take the right fork upwards. Further
along the trail, there will be a small wooden bridge to your left. Take the
bridge and at the second section of bridge, there will be on your left a tree
with fallen trees on either side of it. You can step off the bridge onto one
of these fallen trees. At the base of the standing tree, within the roots is
the letterbox!

You can go back the way you came, or follow the trail back to the parking
lot. There are many secondary trails that criss-cross this park. Also, many
local schools use the park as an outdoor classroom. Please be discreet. I
hope to plant some more letterboxes in this park soon!

This is an Old-growth Evergreen Forest in the heart of Seattle. There are a
variety of birds, trees, ferns and shrubs in the park.

Amanda from Seattle