Improve your ability to run goal marathon race pace with this sneaky tough interval session.
See what some of the best athletes from the track, roads and trail want to accomplish this year.
The 29-year-old talks injuries, 2014 plans and shares some advice for aspiring professional runners.
They begin the famous seven-mile race 10 minutes before everyone else.
Americans Tyler McCandless, Fernando Cabada, Stephanie Rothstein Bruce and Maegan Krifchin amongst top entrants.
Ethiopian takes the title nearly a minute ahead of her closest competitor.
Deena Kastor placed fourth overall.
Olympic bronze medalist Deena Kastor is on the women's squad.
Watch the marathoner do one of her last big workouts before the Boston Marathon.
American Dathan Ritzenhein runs a strong race to finish third overall.