We saw this location on the map and were surprised that we'd not noticed it before (or done a cache here). We drove over and took a nice walk in the woods and hid this cache.
You're looking for a square brown lock and lock container. It contains a log and some toys UltraViolet was willing to part with.
Historically, this park was home to a single cache placed in 2002: GC376A - Groundhog Day Cache