There are three distinct mountain ranges within the U.S. Interior Highlands: • The
Ouachita Mountains of Arkansas and Oklahoma, which can be divided into a number of subranges including the mountains of the
Arkansas River Valley (called the Frontal Ouachita Mountains); the highest point is
Mount Magazine at . • The
Boston Mountains of the Arkansas and Oklahoma
Ozark Plateaus; the highest point is Wahzhazhe Summit (formerly known as Buffalo Lookout), at , east of
Pettigrew, Newton County, Arkansas. Wahzhazhe is the
Osage people’s name for themselves in the
Dhegiha Siouan language. • The
St. Francois Mountains of the Missouri
Ozark Plateaus; the highest point is
Taum Sauk Mountain at . The U.S. Interior Highlands is dominated by
temperate broadleaf and mixed forests. Three
national forests are located here: The
Ouachita National Forest in Arkansas and Oklahoma; the
Ozark-St. Francis National Forest in Arkansas; and the
Mark Twain National Forest in Missouri. ==Gallery==