Triathlete Brad Seng resides in Boulder Colorado where he trains for triathlons as a professional athlete. Can you imagine swimming for 2.4 miles, biking for 112 miles, and just to make sure you do not have too much energy left over, run a full marathon of 26.2 miles? Those three events are run back to back to back (in 1 day!), and is exactly what Brad Seng trains for as a Triathlete in Colorado. The rigors and discipline create quite the training regimen. As seen in the video above, Boulder Colorado is one of the best places in the world to train for this type of athletic endeavor. Short Video here.