A sleepy Californian town, Hill Valley saw little news or attraction until being made famous by the pop-docu-drama Back to the Future, in which a 1981 DMC Delorian, easily the single most successfully selling car of the era (April-May 1980), is successfully converted into a shiny (stylish?) time-machine. One of the more famous residents of Hill Valley, Marty McFly, leads the audience on the emotional rollercoaster that comprises the history of this All-American-Et-Al village.
Since the creation of the docudrama, the history of Hill Valley has been researched tirelessly by those interested, mainly due to various accidents discovered to have occurred during its biographical filming.
According to the film, the town of Hill Valley was settled in 1850 and was incorporated in 1865. By the 1880s, it was connected by railroad to San Francisco. Construction of a new county courthouse was well underway in 1885, the year a new clock was dedicated for the building. The Shonash Ravine Bridge was completed in the Summer of 1886, around the same time the ravine was renamed the Clayton Ravine Bridge, so named for the teacher whose runaway horse carried her over the edge. After the arrival of the film team in 1885 (and a rather embarrassing encounter involving the local Native American tribe), one of the actors discovered the runaway horse and saved the teacher, thus not providing any reason for the Shonash Ravine to be renamed. Attempts by the film crew to convince the town that the ravine simply HAD to be renamed for the sake of the space-time continuum were met with scorn, and thrown out on grounds of heresy. According to many conspiracy theorists, at least one producer was hung for being a witch, however no evidence has been found to corroborate this theory.
The actor who saved the teacher refused to comment on whether or not he 'hit that'.
According to legend, Clint Eastwood, famous for his films Dirty Harry and Weekend at Bernie's, also discovered a time machine, and by some freak chance, ended up in 1885. After an all-night-bender at the local saloon in Hill Valley, during which the locals swore that there was absolutely no way he could be a famous actor, let alone perform his own stunts, he attempted to 'show them up' and hijacked a steam train. While the townsfolk were impressed, they also found themselves with the option to rename the bridge the Eastwood Ravine Bridge because Eastwood had forgotten that at this particular point in time, the bridge had not been completed. Unfortunately, in his drunken stupor, he has misunderstood the 'Point of No Return' sign constructed by the townsfolk to mean 'You Break It, You Buy It'. Being a famous actor, he figured he could afford a new train. And so, Clint Eastwood and his new train went careening off the end of the unfinished track, where the locomotive made a spectacular explosion. Whether Clint Eastwood actually survived is still up for debate.