Shilshole Bay Marina, one of the biggest on the west coast, on the western edge of Seattle. Mostly sailboats, tons of them, lots of interesting destinations nearby, good year round sailing, and a 15 minute drive or 35 minute bike ride from my house.
shilshole bird's eye view
p.s: if you use photos that you didn't take please reference the source. It's not cool to borrow other people's photos without attribution.