Seattle Hempfest is an annual event in Seattle, Washington, the world’s largest annual gathering advocating decriminalization of marijuana. Founded in 1991 as the Washington Hemp Expo, a self-described “humble gathering of stoners” attended by only 500 people, and renamed the following year as Hempfest, it has grown into a three-day annual political rally, concert, and arts and crafts fair with attendance typically over 400,000