Country Jam is one of the biggest and most important country music festivals in the United States, drawing tens of thousands of fans to Colorado every summer to enjoy several days' worth of the biggest and brightest acts in country music. The festival takes place at the Country Jam Ranch in Grand Junction, Colo., every summer, and it just gets bigger and better every year. Tim McGraw, Keith Urban, Toby Keith, Jason Aldean, Thomas Rhett, Kenny Chesney, Florida Georgia Line and Miranda Lambert are a few of the recent headliners.