A mother of two was struck and killed by a car while out for a morning run last week.
The purse for the July 4th race increases to $100,000 for this year.
Bedan Karoki joins the sub-60 half marathon club.
The two have finished close together in several races in recent years.
Great Britain's Mo Farah causes a stir with a mid-race fall in Central Park
The double Olympic gold medalist finished second despite hitting the pavement hard.
More than 25,000 runners rocked the nation's capital on Saturday morning.
The double Olympic gold medalist will have his hands full against a loaded field of superstars.
The 25-year old took over 13 minutes off her 26.2-mile personal best at last weekend's ASICS L.A. Marathon.
The Boston company wants to reach a lofty number before the Boston Marathon.