Who: 162 of the top female marathon runners in the U.S.

What: The 2008 U.S. Olympic team trials-women's marathon. The U.S. Olympic team in women's marathon will be decided by the race.

When: Sunday, April 20, 2008, 8 a.m. (the day before the 112th Boston Marathon).

Where: A multi-loop course in Boston and Cambridge.

Key runners: Deena Kastor, Elva Dryer, Mary Akor , Kate O'Neill , Turena Johnson Lane, Magdalena Lewy-Boulet, Blake Russell, Linda Somers-Smith, Joan Samuelson.

Key runners: Deena Kastor, Elva Dryer, Mary Akor , Kate O'Neill , Turena Johnson Lane, Magdalena Lewy-Boulet, Blake Russell, Linda Somers-Smith, Joan Samuelson.

Street information: The race will start and finish at the traditional Boston Marathon finish line on Boylston Street. It will feature a one-time loop that passes the Boston Public Garden, Boston Common, the State House and Beacon Hill. The course will then feature four loops of approximately six miles each proceeding down Commonwealth Avenue, crossing the Charles River into Cambridge using the Massachusetts Avenue Bridge, running east, then west along Memorial Drive. Runners then return from each of the loops via Massachusetts Avenue.

Expect these roads to be closed for about three hours on race day.

For more information, visit the official website of USA track and field.