Garrahan Park is right on SR 9, about 2 miles North of Boulder Creek. There is a nice field and playground.
The park was created in honor of Lisabeth Ann Garrahan, and renovated in 2010 with a brand new playground. It was also completely re-landscaped. This article tells the story.
The park, and in particular the playground, can be very busy. I hid the cache near parking and away from the playground. The hint is pretty explicit, please use it if the park is busy.
Please don't intentionally bury the cache. Mother nature will do that on her own over time.
Congratulations to BigTurtleHiking for being the first to find!