Victoria Mitchell is trying to raise money as she prepares for the 2016 Olympics.
The Tennessee runner hopes to improve on last year's Houston Marathon time of 2:18 this weekend.
Jamie Young will take on the 26.2-mile journey to raise money for the Shamrock Foundation.
The annual race through the British capital will be Farah's first time racing the 26.2-mile distance
The high school senior finishes on the podium at the NYC Gotham Cup
The teenager completed 13 half marathons in 2013.
Rynn Berry was found in a New York City park after collapsing on New Year's Eve.
The Ethiopian has three Olympic gold medals and one silver on the track.
The special event will honor the late Finnish distance running legend as part of the Millrose Games.
The 17-year-old high school senior turned professional last year and is now coached by Alberto Salazar.