Join us Saturday, September 26, 2026, for a special celebration as we mark a decade of the Belleville Main Street Marathon and Half Marathon—with the half marathon serving as the official Illinois State Championship! You'll run down America's longest Main Street in this charming historic community near St. Louis, and the first 900 registered runners will snag a sweet pair of goodr sunglasses at packet pickup (hurry, only about 50 pairs left as of late July!).