Jul. 21—ROCHESTER — The Olmsted County Fair, which runs July 21 to 27, will include new activities, such as STEM Day and the Bucking Wild Big Hat Rodeo. The Science, Technology, Engineering and Math Day is from 11 a.m. to 4 p.m. Wednesday, July 23, in the Toyota Arena (Graham 4 building). The event will feature more than 16 hands-on activity stations hosted by local employers and organizations ...