The Hash House Harriers (HHH or H3) is an international group of non-competitive running social clubs. An event organized by a club is known as a Hash or Run, or a Hash Run. A common denominal verb for this activity is Hashing, with participants calling themselves Hashers. Male members are referred to as Harriers and females are known as Harriettes.

The Hash is humorously known as A Drinking Club With A Running Problem, with the preferred beverage of consumption being beer.