In the world of cooking competitions, chili is the great equalizer. Chefs, winemakers, farmers, firefighters and every other kind of connoisseur are gathering this weekend in Napa Valley to put their chili to the test in the Rutherford Chili Ball. Hosted by the Rutherford Dust Society, a collective of the region’s vintners and farmers, this popular event heaps delicious helpings of chili upon the masses. Kids’ activities, live music, beer, wine and other barbecue favorites are also on hand Sunday, Aug. 6, at Pestoni Family Estate Winery, 1673 St. Helena Hwy., St. Helena. 4pm. $45 and up; kids 6 to 12, $15; kids five and under, free. 707.963.0544.