Definitely one of our favorite locations, Baylands Park has multiple sites from which to choose, accommodating groups of 50-130 with two sites that accommodate 325 each. You can combine multiple sites if you are planning for a larger group. There are two play structures for the kids and lots of green space for fun and games. And this park allows many of the games that are typically desired at a picnic. For those into hiking, there are miles of trails as well.
Baylands Park Info:
http://sunnyvale.ca.gov/Departments/CommunityServices/Parks/BaylandsPark.aspx
Baylands Park Site Map:
http://sunnyvale.ca.gov/Portals/0/Sunnyvale/DCS/Parks/Baylands-Park-Map.pdf
