The Turnpike Troubadours perform for a sold-out crowd at the Pageant in St. Louis on Saturday, Jan. 28, 2017. Photo by Jon Gitchoff 3 Jon Gitchoff ...

The headliner on Friday, Oct. 17, will be Norwegian DJ Kygo and "red dirt" country band Turnpike Troubadours will headline on Sunday, Oct. 19, after the Grand Prix.