If you stay a while, be sure to pay the $5 day use fee and check out the playground, the extensive beach area, and the view across the river.
An easy walk from the main entrance. The cache is a small camo bottle.
A sign farther in the park notes that poison oak is in the area. We didn't observe any at GZ but geocachers should practice safe caching.
Congratulations to Twinx Two for FTF!