Chattanooga is a city of gateways, between mountains and river, North and South, and as a IRONMAN 70.3 Chattanooga, it becomes the Gateway to Endurance. Known as the Scenic City, 5 thrilling triathlons in distance miles expands, a triathlon event which has been a staple of the IRONMAN calendar since 2014. But this year the race takes the event of the race on the following day. A Chattanooga offers a race experience that gives athletes a more unforgettable overall event and finishing across.