The lowest elevation in Kansas is 680 feet (207 m) above sea level at the confluence of the Verdigris and Arkansas Rivers in southeastern Montgomery County, near the Oklahoma border (approx. 37.0° N, 95.3° W).
The Arkansas River enters Kansas at ~1,000 ft and exits at 680 ft, dropping ~320 ft across the state. The Verdigris joins from the north, draining the Osage Cuestas. The low point sits in the Arkansas River Lowlands, a broad alluvial plain.