Lanterman Developmental Center, opened under the name the Pacific Colony, was a public psychiatric hospital and a facility serving the needs of people with developmental disabilities, and was located in the San Gabriel Valley in what was once Spadra (now part of Pomona), California.

[4] The first patients were added to the program on March 20, 1921, however the site was inappropriate (in part due to a lack of water) and it was closed on January 23, 1923.

[4] The campus sat on 302 acres, and offered 24-hour residential care for lifelong conditions like cerebral palsy, epilepsy, Down syndrome, and autism.

[4] In 2015, the hospital was named as one of the state run facilities with cases of multiple deaths and neglect, documented between 2003 and 2012.

[9][10] The hospital and facility building was fully closed on July 1, 2015, the same year ownership of the property was transferred to California State Polytechnic University, Pomona.