The Zucchini Car Races are exactly what it sounds like. You bring in your decorated zucchini, wheels attached, to Arbor Park in Sonoma and pit it against other zooming zuchs in a family-friendly tradition now in its 27th year. Entries must be no wider than 10 inches with wheels smaller than a roller skate’s. Wine and food trucks will be on hand. The Zucchini Car Races take off on Friday, July 31, in Arbor Park at Sebastiani Winery, 389 Fourth St. E., Sonoma. 5:30pm. Free. 707.933.3232.