In no specific order
Pike Place Foundation (for the FOOD person) – Sunset Supper at Pike Place Market – typically in August.
Great Pumpkin Beer Festival (for the BEER person) – Elysian Brewing – typically in October.
By far the greatest single event the world over for straight oysters…
Elliot’s Oyster New Year – typically first week in November!
*I have written about Elliot’s Oyster New Year before – and the event has always continued to be my favorite Seattle event period.