At the beginning of the 2011 season she ran in California and set track bests of 15:27.94 minutes and 32:45.05 minutes for the 5000 m and 10,000 m, respectively.[2] At the 2011 Central American and Caribbean Championships in Athletics, she won the second regional title of her career, this time taking the 5000 m gold medal.[4] Romero was chosen to represent Mexico in both long-distance track events at the 2011 Pan American Games in Guadalajara. She completed a distance-double for the host nation, becoming the second woman to ever achieve the feat at the tournament after her fellow Mexican Adriana Fernández.[5]
She began 2012 with a win at the LALA Marathon in Torreón, which she completed in a time of 2:31:15 hours.[6] She competed at the 2012 Summer Olympics, finishing in 46th place in the women's marathon.[7]