Rocky Mountain National Park
Located just northwest of Boulder, Colo., Rocky Mountain National Park is the perfect leaf-peeping destination for those who don't live in close range to all the protected areas along the coasts that are well known for their colorful fall foliage.
Much of the park consists of evergreen trees, but there is an abundance of deciduous trees likes quaking aspens and cottonwoods at elevations between 6,000 and 10,000 feet.
Because it straddles the continental divide, the eastern and western sides of the Rocky Mountains each have a distinct climate. The east tends to be more arid while the west tends to be wetter and more wooded.