There's a couple of big play structures and a great water play area, so be sure to bring your kid's bathing suit, towel, and sunscreen (probably closed due to drought but you should have a swimsuit in your car at all times!). There's also a big grass field, paved paths for bike or scooter riding, and a small skate park!
The park is on Bollinger Canyon Road, off of the 680. You can get there from the 24, then south on 680, or the 580, then north on 680. Either way, exit at Bollinger Canyon Road, and head east a few blocks. Turn left into the park, then go to the right after entering the parking lot. Meet at the play structure and water play area.
Good lunch options, restaurants which serve beer, in san ramon marketplace.
