The gritty 31-year-old is back to see if she can improve upon her 2011 runner-up finish.
A look at the past decade of Boston Marathon performances.
Meb Keflezighi is ready to defend his Boston Marathon win.
Forever revered among marathoners, Boston Billy's legacy began 40 years ago this spring.
Ethiopian Ejegayehu Dibaba has pulled out due to injury.
A documentary about the Boston Marathon is due out next year.
These spring marathons have developed worldwide appeal.
The reigning Chicago and Boston Marathon champion will be eligible to compete again on Oct. 30, 2016.
Several former Boston winners are among the field of 36 elite runners.
The pair leads a strong contingent of runners that will compete in the race's 119th edition on April 20.