Celebrate December around the Treasure Valley with holiday shows, winter markets, and New Year’s events in Boise, Meridian, Nampa, Caldwell, and beyond.

September in the Treasure Valley is where summer sunshine meets the first crisp hints of fall — and the calendar is packed. From harvest festivals and farm-to-fork dinners to concerts, brewfests, and family-friendly fun, there’s something for everyone. We’ve rounded up the best events in Boise, Meridian, Nampa, Caldwell, and beyond to help you make the most of the season.