Boston Mountains
The Boston Mountains form the southwestern part of the Ozark plateau. They are the highest and most rugged part of the Ozarks. This is because of their young age relative to the other sections. The highest point is 2,578 feet. It has valleys 500 to 1,550 feet deep. Turner Ward Knob (TWK) is the highest named peak. It is in western Newton County, Arkansas and rises to .