Waterloo To Serve As 2021 Overnight RAGBRAI Stop When the Register's Annual Great Bicycle Ride Across Iowa makes a stop in the Cedar Valley this summer, participants will pedal through Evansdale and Elk Run Heights for the first time in the event's near half-century history. Waterloo has been selected to host an overnight stop on the world's largest organized bicycle ride for the fourth time, along with Iowa Falls. The 48th annual week-long, state-wide event is scheduled for July 25-31, starting in Le Mars and ending in Clinton. This year's event will feature a climb of 11,481 feet, making it the 16th flattest in RAGBRAI history. Organizers released the official route over the weekend.