This is a musclewood or hornbeam tree. If you look carefully at the trunk you'll be able to see the sinews that look like muscles.

This cultivar of our native hornbeam tree was developed in south-eastern Wisconsin for superior fall color with the tree turning almost completely orange or red. It grows to about 25 feet tall and wide with a gently rounded form and is tolerant of a wide range of light conditions from full sun to full shade.