It's Marathon Monday, and it has been an exciting day as athletes took part in the 129th running of the Boston Marathon.The entire race aired live on WMUR-TV and WMUR.com. See ongoing coverage in the video player above.See live updates for Marathon Monday in the timestamps below:4:08 p.m.WMUR's Sean McDonald has completed the Boston Marathon! He crossed the finish line in a time of 4:43:48. He finished shortly after WMUR news director Alisha McDevitt, who finished in a time of 4:38:38.3:44 p.m.WMUR's Sean McDonald has passed the 24-mile mark on the marathon course. 2 p.m.ULocal New Hampshire member Nicole Raymond posted a photo with Sean McDonald, who is running today's 129th Boston Marathon.1:38 p.m.WMUR's Sean McDonald has crossed the halfway point of the marathon.12:30 p.m.Emilee Risteen, of Derry and Thomas Cantara, of Nashua, finished the 129th Boston Marathon. 12:04 p.m.Sharon Lokedi from Kenya wins the women's division of the 129th Boston Marathon with an unofficial time of 02:17:22.11:45 a.m.John Korir from Kenya wins the men's division of the 129th Boston Marathon with an unofficial time of 2:04:45.11:25 a.m.WMUR's Sean McDonald and news director Alisha McDevitt left the starting line in Hopkinton and on their way to Boston. 11 a.m.Defending men's champion Sisay Lemma has dropped out of the lead group and was seen stretching out his calf. Before the race, Lemma had noted that he was recovering from an injury.10:44 a.m.American Susannah Scaroni won the women's wheelchair division of the 129th Boston Marathon on Monday in an unofficial time of 1:35:20.10:27 a.m.Switzerland's Marcel Hug won his eight Boston Marathon in the men's wheelchair race. His unofficial time was 1:21:34. 10:00 a.m.Wave 1 runners departed the starting line in Hopkinton on their way to Boylston Street in Boston.9:47 a.m.The professional women runners left the starting line in Hopkinton.9:37 a.m.The professional men runners left the starting line in Hopkinton.9:09 a.m.The professional women's wheelchair division left the starting line and began their 26.2-mile journey to Boston.9:06 a.m. The professional men's wheelchair division left the starting line and began their 26.2-mile journey to Boston.8:45 a.m.WMUR's Jean Mackin spoke with runners at athlete's village in Hopkinton. 8:35 a.m.The men's wheelchair race will begin at 9:06 a.m. followed by the women's wheelchair race at 9:09 a.m. The full list of start times can be found here. 8:30 a.m.Pre-race coverage begins on WMUR and streaming live on WMUR.com and our mobile app. 6:50 a.m.The professional athletes leave the Fairmont Copley Hotel in Boston, heading to the starting line in Hopkinton.6:15 a.m.Officer Johnson and K9 Hootie from the Gilford Police Department are helping at the Boston Marathon.6 a.m.Katherine Underwood talked about the 26.2-mile route that runners will take from Hopkinton to Boston and the guidelines for spectators. 5:30 a.m.The unique 26.2-mile route takes competitors from Hopkinton and through six other cities and towns before arriving in Boston. Arielle Mitropoulos recently broke down the course map, with highlights including the "scream tunnel," Heartbreak Hill and what could be the most thrilling marathon finish in the world. 5 a.m.WMUR's Sean McDonald is leading Team WMUR to raise money for Tedy's Team for today's big race. Donations are still welcome here. To track Sean's progress, you can follow his bib number at 32373.