SF Mad Dash, San Francisco

SF Mad Dash’s Helluva Halloween 5K run comes as close as any event to answering the question “Who would win in a race: Frankenstein or Dracula?” That’s because the run encourages attendees to dress up in their Halloween costumes and run or walk around Golden Gate Park. Though entertaining on the surface, the core of the fall festivities is charitable, as all of the proceeds benefit the Sunset Cooperative Nursery School.