UPDATED 4:26 p.m.: Boston Marathon 2011 is Underway

4:26 p.m.: Bernie Scozzafava, FINISH, 4:21 p.m. Final time 5:37:40.

3:52 p.m.: Rosemary Lydon, FINISH, 3:18 p.m. Final time 4:31:14.

Benjamin Faucett, FINISH, 3:30 p.m. Final time 4:43:42.

Deborah Eappen, FINISH, 3:37 p.m. Final time 4:50:05.

Susan Cannistraro, FINISH, 3:41 p.m. Final time 4:56:40.

Gina Ladocsi, FINISH, 3:41 p.m. Final time 4:56:40.

3:15 p.m.: Heather Cobb, FINISH, 2:36 p.m. Final time 4:09:00.

Bernie Scozzafava, 30K point, 2:40 p.m.

Scott Wolf, FINISH, 2:50 p.m. Final time, 4:05:13.

Samantha Scarpato, FINISH, 2:52 p.m. Final time, 4:05:35.

Thomas Ward, FINISH, 2:59 p.m. Final time, 4:16:29.

Kevin Callaghan, FINISH, 3:06 p.m. Final time, 4:20:26.

David Mussafer, FINISH, 3:06 p.m. Final time, 4:20:26.

Susie Von Rosenvinge, FINISH, 3:06 p.m. Final time, 4:17:52.

David Ayer, FINISH, 3:09 p.m. Final time, 4:21:33.

Michael Hall, FINISH, 3:13 p.m. Final time, 4:22:48.

2:17 p.m.: Michael Hall, 30K point, 1:53 p.m. Rosemary Lydon, 30K point, 1:59 p.m. Benjamin Faucett, 30K point, 2:05 p.m. Deborah Eappen, 30K point, 2:08 p.m. Gina Ladocsi, 30K point, 2:11 p.m. Susan Cannistraro, 30K point, 2:11 p.m. 

Steven Grinspoon, FINISH, 2:08 p.m. Final time 3:33:04.

1:57 p.m.: Mark Perry, FINISH, 1:41 p.m. Final time 3:35:33.

Susie Von Rosenvinge, 30K point, 1:44 p.m. 

Allison Palmer, FINISH, 1:44 p.m. Final time 3:23:20.

Samantha Scarpato, 30K point, 1:45 p.m. David Mussafer and Kevin Callaghan, 30K point, 1:48 p.m. David Ayer, 30K point, 1:49 p.m.

1:34 p.m.: Steven Grinspoon, 30K mark, 1:12 p.m. Scott Wolf and Thomas Ward, 30K point, 1:31 p.m. Rosemary Lydon, Deborah Eappen and Benjamin Faucett, 25K point, 1 p.m. Michael Hall, 25K point, 12:59 p.m. Susan Cannistraro and Gina Ladocsi, halfway point, 1:07 p.m. Bernie Scozzafaca, halfway point, 1:22 p.m.

1:11 p.m.: Lots of updates here: Heather Cobb, halfway point, 12:22 p.m. Steven Grinspoon, halfway point, 12:26 p.m. Mark Perry, 30K point, 12:32 p.m. Thomas Ward, halfway point, 12:36 p.m. Scott Wolf, halfway point, 12:40 p.m. Allison Palmer, 30K point, 12:43 p.m. Susie Von Rosenvinge, halfway point, 12:49 p.m. David Mussafer and Kevin Callaghan, halfway point, 12:52 p.m. David Ayer, halfway point, 12:53 p.m. Samanatha Scarpato, halfway point, 12:54 p.m. 

Joseph Cannistraro, FINISH, 12:56 p.m. Final time 2:55:47.

Stuart Salyer, FINISH, 1:04 p.m. Final time 3:01:07.

Heather Cobb, 30K point, 1:16 p.m.

12:17 p.m.: has results of the winners. Geoffrey Mutai has won the Boston Marathon and set a new world record at 2:03:01.

12:10 p.m.: Get ready for a big update. Mark Perry, halfway point, 11:46 a.m. Benjamin Faucett, Deborah Eappen, and David Ayer, 10K point, 11:48 a.m. Samantha Scarpato, 10K point, 11:49 a.m. Rosemary Lydon, 10K point, 11:50 a.m. Michael Hall, 10K point, 11:51 a.m. Gina Ladocsi and Susan Cannistraro, 10K point, 11:52 a.m. Bernie Scozzafava, 10K point, 11:59 a.m. Allison Palmer, halfway point, 11:59 a.m. Joseph Cannistraro, 30K point, 12:01 p.m. Stuart Salyer, 30K point, 12:11 p.m.

11:50 a.m.: Scott Wolf just crossed the 10K mark at 11:42 a.m., and Susie Von Rosenvinge at 11:45 a.m. David Mussafer and Kevin Callaghan are neck and neck, each crossing the 10K point at 11:45 a.m.

11:42 a.m.: More Weston runner updates! 11:21 a.m., Heather Cobb passed the 10K mark. Joseph Cannistraro passed the halfway point at 11:27 a.m., as did Stuart Salyer a few minutes after. Steven Grinspoon passed the 10K mark at 11:33 a.m. Thomas Ward got to the 10K point at 11:37 a.m.

11:20 a.m.: Mark Perry and Allison Palmer both crossed the 10K point; Perry at 10:52 a.m. and Palmer at 11:06 a.m. Perry is at 46:49, 7:32 pace and Palmer at 45:55, 7:23 pace.

11:13 a.m.: At 10:45 a.m., Weston runner Stuart Salyer passed the 10K point, at 42:28, 6:50 pace.

10:42 a.m.: Weston runner Joseph Cannistraro passed the 10K point, at 41:31, 6:40 pace.

10:20 a.m.: Newton Patch editor Melanie Graham, on the scene in Newton, just Tweeted that the men's wheelchair racers have reached Newton.

10:05 a.m.: Wellesley Patch editor Bret Silverberg is on the scene in Wellesley; check out some of his early-morning pictures .

9:40 a.m.: You can see a full list of Weston residents racing today , and you can follow any runner by their bib number by texting RUNNER to 345678 on your cell phone.

The 2011 Boston Marathon got underway at 9:17 a.m. when the first wheelchair racers crossed the start line in Hopkinton. The elite men and women start at 9:32 and 10 a.m., followed by three waves of qualified and charity runners.

Check Weston Patch throughout the day for coverage of the marathon, including updates on local runners. You can upload your own pictures to this story, as well, when you have them.