Today (September 22, 2020) marks the official first day of fall. That means the start of one of the most colorful times of the year as green leaves turn to red, orange and yellow. Officials say peak foliage in Tennessee runs from October 26 to November 2 and it’s the best time to gaze at vibrant colors. On the plateau, the best time is October 19 to the 26^th and in the Smoky Mountains from September 28 to October 5, 2020.