The gritty 31-year-old is back to see if she can improve upon her 2011 runner-up finish.
The 31-year-old American will face a tough field in Sunday's Rock ‘n’ Roll Arizona Half Marathon.
The pair leads a strong contingent of runners that will compete in the race's 119th edition on April 20.
The race around Central Park will take place June 14.
Seven U.S. Olympians are in the July 4 Peachtree Road Race, which doubles as the national championship.