Clara Brown, née Clayton, is the tritagonist of Back to the Future - Part III.
She is a school teacher from the 1880s, the love interest and eventual wife of Emmett "Doc" Brown and a close friend of Marty McFly.
In the the original timeline, Clara's horses went wild and she fell into a ravine. Because of this, the ravine was named the Clayton Ravine in honor of her. However, her fate was averted when time traveler Emmett Brown saves her. Clara falls in love with her savior and they eventually marry and have two sons named after their favorite author, Jules and Verne.