If you're coming through the Northeast... peak foliage color is around Columbus day in most of upstate NY, a little earlier in the Adirondacks and in other higher elevations - probably Vermont would be included in that.
Please do sample our apples if you get the chance! We grow LOTS of varieties here in NY, and most supermarkets carry a dozen or more kinds. But if you go to a farmer's market, you will find more variety still, along with plums, peaches, apricots... all great for munching while you're on the road. Healthy, too!