Images from Thursday Night Thunder during the Hamilton County Fair featuring Olsen Family USRA Modifieds, Seneca Foundry USRA Stock Cars, Stein Heating & Cooling USRA B-Mods, Diamond in the Rough USRA Hobby Stocks, A1 Automotive USRA Tuners and Jerry Goebel State Farm Super Late Models at the Karl Chevrolet Hamilton County Speedway in Webster City, Iowa, on Thursday, July 27, 2023. (Photos by Brianna Murray).