Arroyo Park in Union City is a cute little park in the middle of a residential neighborhood. There are bathrooms, two playgrounds; one enclosed for toddlers and one for older kids.
There is a basketball court, tennis court, picnic tables with lots of shade and a bbq pit. The field area is huge and great to run around or to get out and get some soccer or baseball practice. All street parking.
Arroyo Park is located at 35199 Perry Road in Union City.