It has a bike swap, a cargo race, BMX tricks, a track-stand contest, a marching band and a tractor pull. Seriously, is this not just a crazy bike festival all ’roided up? All kidding aside: the Sonoma County Bicycle Expo jams every fun thing to possibly do with a bike into a one-day event, starting with the bike swap, where riders and collectors gather to buy, sell, trade and discuss bikes and accessories from every era. Also at the expo is the track-stand contest, where a judge will record how long each competitor can go on their fixed or freewheel bikes without putting a foot down. Other attractions include the crowd—pleasing flatland BMX stunts, performances by the Hubbub Club and a race of silly, practical and creative cargo bikes. All of this and more on Sunday, Aug. 18. Fifth Street between B Street and Mendocino Avenue, Santa Rosa. Free. 10am—4pm. 707.545.0153.