Saying farewell to the long, warm days of summer can be bittersweet, but the sheer majesty of the changing fall foliage makes the transition a little bit easier. As autumn’s cooler temperatures and shorter days set the trees ablaze with color, now is an ideal time to plan a leaf-peeping road trip, hike, train ride or other excursion to take in the views. But since the conditions change from year to year, knowing exactly when to head out to see peak color can be tricky. Fortunately, the tourism site for the Smoky Mountain region put together an interactive fall foliage map that plots the changing leaves across the United States from September to November.