CLEVELAND, Ohio - Fun runs, themed runs, obstacle courses, even marathons have exploded in their popularity nationwide.
The registration for the events can also be relatively expensive, as much as $75 per participant.
It is money that can be lost if the event gets cancelled and the Better Business Bureau is taking a close look at one particular run that has scheduled more than a hundred events across the country, including one in Cleveland on June 6.
"These are popular events, people love these events. They can be a lot of fun. And the real risk is you need to be sure that you are signing up with an event that has some kind of stability," said Sue McConnell of the Cleveland BBB.
The Better Business Bureau says The 'Color 5 Mile' has been abruptly cancelling events across the country.
"Events that were scheduled in various parts of the country have suddenly and abruptly been cancelled and they are not able to talk to the company, not able to get any feedback on what's going to happen to registration fees," said McConnell.
Organizers show four planned runs in Ohio, including events in Youngstown and Cleveland.
The web page for their event in Cleveland shows individual registration fees of as much as $50 per person.
Attempts to reach organizers on Friday were unsuccessful. The telephone number for event support has been disconnected. The Better Business Bureau believes even the New York address for it's headquarters may be fraudulent.
The run is not to be confused with a similar run planned for Voinovich Park in Cleveland on June 20, hosted by completely different organizers who have a reputation for staging successful and extremely popular 'color runs' nationwide, including several in Cleveland.
As a result of the 'Color 5 Mile' complaints, the BBB is urging everyone to be more careful when they consider registering for an event.