This is a great area to hike. We took the longer trail (5.8 miles round trip) to the campground. You can see Santa Cruz Mountains along the way and the views are spectacular. There are some sections of the trail that have tricky footing, so be careful.
There are free parking outside the entrance of the park. If you arrive slightly late and all the free parking lots are taken up, you can park at the entrance of the park for $8.