I just saw this in the newspaper: the 19th annual Fairfield Tomato Festival. Sat August 15, 10-5, Sun 11-4. Tomato tasting of 150 varieties from a Suisun Valley tomato grower. A contest for best homegrown tomato (have to enter first thing Sat. am). Otherwise sounds like your basic Calif. street fair.
www.fairfieldmainstreet.com