White Tank Mountain Regional Park

Offering 240 picnic tables with grills, 80 of which have a small cover, White Tank Mountain Regional Park encompasses more than 29,000 acres of desert and mountain landscape, making it the largest regional park in the county. Another great spot to picnic while enjoying the serenity of the Arizona desert. Some areas of picnicking have running water, playgrounds for children, electrical outlets, and clean bathrooms.

http://www.maricopa.gov/parks/white_tank/picnicking.aspx