Looks like the bottom will fall out later this week.
The 10K, 5K and other events have been called off for the day.
It happened in Barron County, Wisconsin.
Giant waves battered the city's shoreline, damaging public walkways and parks.
Huge amounts of rain fell in Murray County, causing widespread flooding.
The owners are blaming construction work outside.
Wind gusts hit up to 70mph in parts of the state.