Over 50,0000 runners finished the 2010 Bolder Boulder this year and among them were at least three professional triathletes.
Chrissie Wellington, Olympians Laura Bennett and Greg Bennett all raced in the professional waves and took on some of the best 10K runners in the world.
Chrissie Wellington raced for the U.K. while Olympian Greg Bennett ran as pro for the first and last time for team Australia.
Click HERE to read why Greg is racing for Australia for the last time.
His training partner, Olympian and wife, Laura Bennett raced for team Colorado as part of the professional field of runners.
So how did they do? Watch the video and find out.