Berkeley was a city in the San Francisco Metropolitan Area, California. The city was located across the San Francisco Bay from San Francisco. The University of California, Berkeley was located in this city.
In the 1960s, Berkeley was the nexus of the Free Speech Movement. In 1986, the city's location was depicted on a San Francisco Municipal Railway system map. Later that year, James T. Kirk informed (not entirely truthfully) Dr. Gillian Taylor that Spock's aberrant behavior was result of his involvement with the Free Speech movement and his overindulgence in "LDS" [sic]. (Star Trek IV: The Voyage Home)