Kenyans Daniel Limo and Ogla Kimaiyo take the overall victories on a warm day.
The husband-wife team head into the LA Marathon on different trajectories.
This weekend's event will feature many of the top runners in the country.
The 31-year-old is excited to compete for a national title on March 15.
The American defeated Olympians Abdi Abdirahman and Ryan Hall at the Gatorade Half Marathon in San Jose.
Ryan and Sara Hall, Abdi Abdirahman and Matt Llano headline the second running of the Gatorade San José Half Marathon.
Seven U.S. Olympians are in the July 4 Peachtree Road Race, which doubles as the national championship.
Shalane Flanagan finishes second, Sean Quigley places seventh to finish as top Americans.
Christo Landry won the men's USA title in 46:41.