A new map from the folks at the epicenter of fall color season, the Great Smoky Mountains, shows where and when fall colors should be peaking all across the U.S. By next week colors are peaking. The best, fullest fall colors in Summit County arrive in the third week of the month, starting Sept. 22. Wind, rain and especially a few days of sub-freezing weather could mess up your fall foliage trip planning. Fall colors are already here!