The aim of this study was to evaluate the pre and post-weaning performance of Columbia lambs under an intensive system in central Mexico. Productive data of 657 Columbia lambs (346 males and 5.3 kg at birth
311 Females and 4.9 kg at birth) in the period from 2017 to 2020 were considered. Live weight data were collected by sex, birth weight (BW), pre-weaning average daily gain (preADG) and post-weaning average daily gain (postADG), weaning weight (WW), final weight (FW), final age (FA) and mortality percentage data. No significant interactions between year, sex and litter size were found (p >
0.05). Differences were detected among years for all variables (p <
0.05). When comparing males vs. females, the highest values were found in males in almost all the variables (p <
0.05) except for FW and mortality (p >
0.05). The age to achieve final weight was greater in females (p <
0.05). Regarding litter size, singles were heavier and had more preADG than twins (p <
0.05). The phenotypic correlations showed significant (p <
0.05) and positive relationships between 1) BW with preADG and postADG, 2) preADG with WW and 3) FW with FA. On the contrary, negative correlations were detected (p <
0.05) between 1) WW with postADG and 2) postADG with FW. In conclusion, Columbia breed lambs could played an important role to improve meat production in intensive systems in central Mexico.