I used to walk around this park when lived in Shoreline around 2012. The park has changed a bit since. I remember the trails being a bit more intuitive back then, but this lil loop is still quite an adventure. Be cautious crossing any logs over the stream while exploring. I stepped on a wasp nest, I wouldn't recommend!
The cache is hidden under a pile of concrete and rebar along the hidden loop trail near the stone footpath that crosses the creek. It's under a rock that moves if you touch it.
Congratulations to Emmilliam for the FTF!!