I already missed posting on the Greek Festival, Blues Brews and BBQs, and Savor Idaho is sold out. Off the top of my head here are the ones left this summer, but I hope others will add to this.
Emmett Cherry Festival
Boise Co-Op 40th anniversary: June 22
Northwest Rib Fest: June 27-30
San Inazio Festival (Basque Festival): July 27-28
Basque Wine Fest: August 16
Tour De Fat: Aug 17
Idaho State Fair: Aug 16-25
(Okay, not purely food, but c'mon it's the fair!
Art in the Park: Sept 6-8
(not technically food-centered, but plenty of food trucks and vendors