Weed Lifestyle August 17, 2012 Seattle Hempfest Kicks Off Today Moirai Seattle Hempfest kicks off its 21st birthday today and runs through the weekend with crowds of over 300,000 people expected. Seattlepi.com reflects on Hempfest’s rich history and significance. Categories: Best of the Web, Hemp, Weed Lifestyle Tags: activism, hemp, Hempfest, marijuana, Seattle, Seattle Hempfest, Washington. By: Moirai. Permalink: .