It's marathon day in Boston.
Some 25,000 runners are getting ready for the 26.2 mile trek from Hopkinton to Boston.
The weather should be just fine for athletes and spectators alike, with partly sunny skies expected and a high temperature near 60.
Robert Cheruiyot of Kenya and Lidiya Grigoryeva of Russia are back to defend their titles from a year ago. The Kenyan is seeking his fourth Boston victory. That would put him in a league with only two other men: Bill Rodgers, who won four times, and seven-time winner Clarence DeMar.
Cheruiyot says a marathon is "the hardest thing in life."