Elite runners will try to qualify for the 2016 U.S. Olympic Marathon Trials.
Seven U.S. Olympians are in the July 4 Peachtree Road Race, which doubles as the national championship.
High temperatures didn't slow the field much in a variety of races in Eagle Rock, Calif.
Aaron Braun, who will make his marathons debut, leads the American men's lineup.
The 38-year old from San Diego captured his 22nd national title.
The 38-year-old Keflezighi made his winning move at 15K.
The two-time NCAA Cross-Country champ had a premonition that he'd prevail.
Braun missed Steve Spence's 12K American record by 2 seconds.
The newly minted marathoner is ready to mix it up against a stacked men's field.