Following the valley of the Arkansas River, the line enters the Osage Hills and begins climbing the south bank of the river.

The eastern part of the county contains the Osage Hills, an extension of the Flint Hills in Kansas.

It was really only a low but steep foot-hill to the Osage Hills.

The preserve, which stretches across some 60 square miles of the Osage Hills, is owned and managed by the Nature Conservancy, a private conservation group.

Oklahomans generally refer to the same geologic formation as the Osage Hills or "The Osage."

The Tallgrass Preserve sits amid the Osage Hills of north central Oklahoma.

Gilcrease is the only known art museum to have these educational and inspirational gardens on one site nestled in the Osage Hills.

The Osage Hills is a hilly area in Oklahoma, commonly known as The Osage.

William Hale, the so-called "King of the Osage Hills," was a U.S. cattleman and convicted murderer.

Popular state parks include Keystone Lake and Osage Hills.