"Go ahead! Make my day."This article needs sources, now!Please discuss acceptable sources on this article's talk page. Calahan High School is a school that may have existed in Hill Valley. 1955 On November 11 , 1955 , the Hill Valley Bulldogs played against the Calahan Indians. Retrieved from "https://backtothefuture.fandom.com/wiki/Calahan_High_School?oldid=57015" Categories: Articles with no sources Non-canon articles Locations 1955 Community content is available under CC-BY-SA unless otherwise noted.