RAGBRAI, Register’s Annual Great Bicycle Ride Across Iowa, is more than just a bike ride. It is an epic seven-day bicycling adventure that tests endurance, showcases community and builds lasting friendships. Waterloo will be an overnight stop on July 28th. Over 15,000 cyclists will be arriving in Waterloo. The event downtown Waterloo will host 2 music stages at RiverLoop Expo Plaza and the RiverLoop Amphitheater.