Men's Health magazine will be hosting their annual Urbanathlon & Festival on Saturday Oct. 16, and "Extra's" Mario Lopez will serve as celebrity host.
The event, now in its fourth year, will take place in Chicago and will challenge participants in a 9-mile competition consisting of traditional road race elements and obstacle courses.
Mario will be there to warm up over 7,000 athletes and to sound the starting of the gun.
The race starts at 7:45 AM and will be followed by a festival with live music, food, drinks, and -- it's free to the public!
Visit MensHealthUrbanathlon.com for more info.