Eastern New Mexico University is a public university with a main campus in Portales, New Mexico, and two associate degree-granting branches, one at Ruidoso and one at Roswell. ENMU is New Mexico's largest regional comprehensive university and is the most recently founded state university in New Mexico. It is a federally designated Hispanic-servin…Eastern New Mexico University is a public university with a main campus in Portales, New Mexico, and two associate degree-granting branches, one at Ruidoso and one at Roswell. ENMU is New Mexico's largest regional comprehensive university and is the most recently founded state university in New Mexico. It is a federally designated Hispanic-serving institution and a member of the Hispanic Association of Colleges and Universities. The ENMU System consists of three campuses.