Thanks Wisconsin Dells Visitor & Convention Bureau for providing this most helpful information
Foliage.org: What are the projected dates for Wisconsin Dells, Wisconsin 2009 peak foliage season?
Mid-October is prime leaf-peeping in Wisconsin Dells.
Foliage.org: Are there areas, vistas, scenic lookouts or other destinations within Wisconsin Dells that are known for their uniquely beautiful autumn foliage displays?
[...]