The Washington State Fair (still called "the Puyallup Fair" by locals) is held every September at the Western Washington Fairgrounds, running for three weeks beginning Labor Day weekend. It is one of the largest state fairs in the United States by attendance, drawing over a million visitors for its combination of agricultural exhibits, carnival rides, livestock shows, concerts, and food stalls. The fairgrounds also host a smaller Spring Fair in April.
Even if agricultural fairs are not your usual interest, the scale and enthusiasm of the Puyallup Fair are worth experiencing. The livestock barns are genuine, the rodeo is well-run, and the food — beyond the famous Fischer scones — ranges from local berry shortcake to the full range of deep-fried carnival novelties. Buy tickets in advance; parking and crowds are serious on weekends.