Kenyan Robert Cheruiyot won the men's race in 2:07:46, missing the course record he set by just 32 seconds. He became the fourth man to win Boston four times, joining American great Bill Rogers.

Armstrong, running together with 50 Livestrong 'teammates,' is raising funds and awareness for his Lance Armstrong Foundation, known around the world as Livestrong. This was Armstrong's first Boston Marathon; he's finished the New York City Marathon twice. Participants in that race raised more than US$500,000 in November 2007.

According to sources close to Armstrong, a professional triathlete before he became a bicycle racer, the Texan stepped on a piece of coral about a month ago which gave him a foot injury and slowed his training down a bit. He added he pushed the pace a bit too hard in the middle of the Boston race, mostly due to the excitement of being there and ended up paying for it in the final four to five miles. Compared to the New York City course, Armstrong also mentioned he felt more "boxed in" but the crowds along the course were unbelievable.

Armstrong said he plans to run the New York City Marathon again this fall.

Lance Armstrong Finishes Boston Marathon in 488th Place

Lance Armstrong finished 488th in the 2008 Boston Marathon, marking his first time in the annual marathon.

Armstrong, the seven-time Tour de France champion and cancer survivor, competed in the marathon with over 25,000 runners. Armstrong, who finished the race in 2 hours, 50 minutes, 58 seconds, is raising funds and awareness for his Lance Armstrong Foundation, known around the world as Livestrong.

Robert Cheruiyot of Kenya won the men's race of the marathon with a time of 2 hours, 7 minutes, 46 seconds, while Dire Tune of Ethiopia won the women's race. Tune, who edged out Alevtina Biktimirova for the win, finished in 2 hours, 25 minutes, 25 seconds.