The Kenyan broke the world mark at the Berlin Marathon last year.
Jeptoo, Kiplagat headline a stellar women's field at the Suja Rock 'n' Roll San Diego Half Marathon.
The pair will compete at the Mattoni Olomouc Half Marathon on June 21.
Mo Farah placed eighth in his full marathon debut but vowed to run another one.
The reigning London and New York City Marathon champion headlines a power-packed lineup.
The 33-year-old two-time world champion is seeking her second title in the Big Apple.
A slew of sub-2:30 women have come from far and wide to race in New York on Sunday.
The 35-year-old suffered a broken toe during a training run over the summer.
Check out these great shots from the 16th annual Rock 'n' Roll Marathon & Half Marathon!