The Ontario Summer Games kick off in Windsor on Thursday with 2,800 athletes coming into town from around the province.
With all the coaches, family and friends coming as well, the games are expected to bring thousands of people to the city.
A good boost for some local businesses, with 17 hotels already booked solid for the event.
"We're completely sold out," said Brian Yeomans at the downtown Holiday Inn.
Yeomans said the games benefit the entire city.
"Mass hysteria," he said. "Is that a way to put it? It's absolutely fantastic, we're so busy."
Tourism Windsor-Essex Pelee Island said the games bring in fresh money during a season when those dollars are hard to come by.
"We're really not estimating economic benefit," said Gordon Orr, CEO, Tourism Windsor-Essex Pelee Island. "We just know that they're huge injections of money that are being generated by those athletes coming here and, in particular, by the spectators that are coming."
Michael Chantler is in charge of the games. He said he was excited for the event to start.
"Anxious to get it going," he said. "We've already got athletes rolling in town … we've got the golfers that came to check in, we've got the soccer teams rolling in. It's getting very real, very quickly."
The opening ceremonies kickoff at 7:30 p.m. at the University of Windsor's Alumni Stadium.