1:17 p.m. The throngs of runners numbering close to 20,000 continue to flood Copley Square, rounding out this year's Boston Marathon.

12:13 p.m. Now that the winners have finished, the main pack heads through Heartbreak Hill on their way into Boston.

12:04 p.m. American Ryan Hall takes fourth in the marathon, finishing 2:04:03, good for an American world record.

12:03 p.m. Geoffrey Mutai wins the Boston Marathon with a world record time of 2:03:01. Mosop finished just behind him with a time that also would have qualified for a world record, had he won.

11:58 a.m. Moses Mosop and Geoffrey Mutai are neck and neck heading into the final stretch. Both are well under world record pace as they near Copley Square.

11:53 a.m. It looks like Davila made her move too early, as Kilel takes first. Davila finishes in a close second.

11:48 a.m. American Davila continues to lead as the women head into Kenmore Square.

11:39 a.m. It's official, Kim Smith is done at mile 20. Spotters reported that EMTs picked her up moments ago.

11:24 a.m. American Ryan Hall maintains a close lead over the rest of the pack, hot on his heels. Desiree Davila also takes the lead for the women heading into Heartbreak Hill.

11:17 a.m. Kenyan Caroline Kilel has taken the lead after the heartbreaking injury to Kim Smith.

11:10 a.m. Kim Smith running into trouble as the pack starts to catch up with her at mile 18.

10:51 a.m. Japan takes the women's wheelchair race as well, with Wakako Tsuchida finishing with an unofficial course record of 1:28:51.

10:44 a.m. Kim Smith continues to add to her lead at the halfway point, Wellesley. She now leads by almost a minute.

10:40 a.m. The third, and final wave now departs, with the recreational runners/walkers setting out for Boston.

10:37 a.m. Japanese athlete Masazumi Soejima wins the wheelchair divison, narrowly missing the course record.

10:29 a.m. The wheelchair division nears Boston with Australian Kurt Fearnley leading at the 21 mile marker.

10:20 a.m. Here come the throngs of people in the second wave, where the "amateurs" run the marathon from. There are many great stories today, with many locals running for charitable causes including Emmanuel College senior Chris Puzacke.

10:03 a.m. The men start down Route 135 on the way to Boston with Ryan Hall leading the pack for the USA.

9:32 a.m. And they're off. The elite women, that is. Kim Smith darts out to an early lead ahead of one of the largest packs in the marathon's history.

9:22 a.m. The handcycle participants have just left Hopkinton, and now head toward Boston. Just ahead of them are the wheelchair division, who started five minutes before.

9:01 a.m. With traffic logjammed for miles around Hopkinton, the mobility impaired program has just begun.Here are the other start times:

Wheelchair division start :9:17 a.m.

Handcycle participants start: 9:22 a.m.

Elite women's start: 9:32 a.m.

Elite mens start and First Wave: 10 a.m.

Second Wave: 10:20 a.m.

Third Wave: 10:40 a.m.

Stay tuned for updates.