Blackberries grow on roadsides all over the northwest. Bremerton even hosts a Blackberry Festival in the fall. There are many berry farms which for a small fee you may pick your own strawberries, blueberries and many other types. Be careful when foraging for wild blueberries, as they can be confused with the Oregon Grape which may be posionous. Ask friends and neighbors if they grown berries in thier garden, often they are willing to let you pick what you can when thier crops are plentiful.