The seven day event was scheduled to start in Le Mars on July 19 and end in Clinton on July 25.
"Obviously we're disappointed that it's not going to be here this year. But with everything, it's just not feasible to do. It's not safe for our riders. There's a multitude of things and safety is first and foremost," Mary Seely, Executive Director of Clinton Convention & Visitors Bureau, said.
Throughout the seven say event, the bicyclists stop in towns along the route, ending in Clinton where they continue the tradition of dipping their bicycle tire in the Mississippi River.