The last big outdoor festival of the year, Issaquah Salmon Days, takes place in the first weekend of October. It is a celebration of the return of salmon to the lakes, creeks, and hatchery of the town, just down the road from Maple Valley. Businesses and organizations will have booths. There will also be food, music, and everything that makes a festival fun. You will find the celebration in Issaquah's central business district.