Today, Dean Karnazes faced his first real test in his Endurance 50 quest to run 50 marathons in 50 days in all 50 states. Last night, he came down with a raging head cold and hardly slept a wink. Nevertheless, he was able to drag himself to the start line right on time--at 7 AM. And then he promptly covered 26.2 miles in 4 hours 15 minutes--with 21 other runners, including two first time marathoners. Next stop: Boulder, Colorado.