Hwy 420 in Silverdale is now open!!!! Recreational , Medical and Annex! Hwy 420 Silverdale is a full service recreational and medical marijuana store. We offer a wide variety of flower, vape pens, cartridges, and concentrates. Our annex offers all paraphernalia, books, cards, shirts, hats and much much more. Come in and talk to one of our knowledgeable Budtenders for all your marijuana needs.