U.S. Interior Highlands
Highland
1:1000000 scaledigital elevation model (DEM) of the U.S. Interior Highlands
Location	United States
Highest elevation	2,753 ft (839 m) (Mount Magazine)

TheU.S. Interior Highlands is a mountainousregion in theCentral United States spanning northern and westernArkansas, southernMissouri, easternOklahoma, and southernIllinois.^[1] The name is designated by theUnited States Geological Survey to refer to the combined subregions of theOuachita Mountains south of theArkansas River and theOzark Plateaus north of the Arkansas. The U.S. Interior Highlands is one of few mountainous regions between theAppalachians andRockies.

There are three distinct mountain ranges within the U.S. Interior Highlands:

• TheOuachita Mountains of Arkansas and Oklahoma, which can be divided into a number of subranges including the mountains of theArkansas River Valley (called the Frontal Ouachita Mountains); the highest point isMount Magazine at 2,753 ft (839 m).
• TheBoston Mountains of the Arkansas and OklahomaOzark Plateaus; the highest point is Wahzhazhe Summit (formerly known as Buffalo Lookout), at 2,561 feet (781 m), 3.4 miles (5.5 km) east ofPettigrew, Newton County, Arkansas. Wahzhazhe is theOsage people’s name for themselves in theDhegiha Siouan language.
• TheSt. Francois Mountains of the MissouriOzark Plateaus; the highest point isTaum Sauk Mountain at 1,772 ft (540 m).

The U.S. Interior Highlands is dominated bytemperate broadleaf and mixed forests. Threenational forests are located here: TheOuachita National Forest in Arkansas and Oklahoma; theOzark-St. Francis National Forest in Arkansas; and theMark Twain National Forest in Missouri.

• 
  The Ouachita Mountains from Flatside Pinnacle (November 2013)
• 
  The Boston Mountains from Sam's Throne (December 2015)
• 
  The St. Francois Mountains from Hughes Mountain (April 2017)

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• U.S. Interior Highlands
• Mountain ranges of the United States
• Physiographic regions of the United States
• Mountain ranges of Arkansas
• Mountain ranges of Missouri
• Mountain ranges of Oklahoma
• Mark Twain National Forest
• Ouachita Mountains
• Ozarks
• Ozark–St. Francis National Forest
• Regions of Oklahoma
• Regions of Arkansas
• Regions of Kansas
• Regions of Missouri
• Protected areas of the U.S. Interior Highlands
• Oklahoma geography stubs

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