Cristhian Simeon Pacheco Mendoza (born 26 May 1993) is a Peruvian long distance runner who specialises in the marathon.

[1] He won the Marathon at the 2019 Pan American Games which was held in Lima, Peru.

This race set a new Pan American Games record with a time of 2:09.31.

On February 19, 2023, he placed 11th in the Valencia Marathon in a time 2:07:38 breaking his own personal best, and the national record, by nearly 2 minutes.

[3] Personal bests International Competition Results He is a younger brother of Raúl Pacheco, also a marathoner.