Dave Wiens at the 2008 Leadville Trail 100

There's a great video about Dave Wiens, the winner of the 2008 Leadville Trail 100 this summer on the New York Times - see The Man Who Took on Armstrong. According to VeloNews:

Dave Wiens pulled away from Lance Armstrong in the final ten miles of Saturday's Leadville Trail 100 in Colorado, winning the race for the sixth time, in record time.
"The guy that I raced today was not the guy who won the Tours," the modest Wiens said at the finish.
Armstrong accelerated on the Columbine climb — which tops out at over 12,000 feet elevation at the halfway point of the out-and-back race — and broke up a group of ten that had formed in the first half of the race. Wiens matched Armstrong's pace and in a few short miles the two had a five-minute gap over third place, which grew to more than 20 minutes at the 80-mile mark and more than a half hour at the finish.

Eventually, Wiens won the Leadville Trail 100 in 6:45:45, about 13 minutes faster than the record he set last year when he was being pushed by Floyd Landis. Armstrong finished second at 6:47:41.