Ironman Chattanooga! This world-renowned triathlon takes place in the beautiful city of Chattanooga, Tennessee, and promises to test your endurance and strength like never before. The course starts off with a 2.4-mile swim in the Tennessee River, which is known for its fast current and scenic views of the surrounding mountains. The water temperature is usually in the mid to high 70s (Fahrenheit), making for a comfortable and enjoyable swim. Once you've completed the swim, it's time to hop on ...