Republican river
Nebraska
The Arkansas River arises in Colorado and still has that name when it flows into the Mississippi. It's the only Colorado river I know of that flows directly into the Mississippi. The Platte (both the North and South) arise in Colorado and join in Nebraska before flowing into the Missouri, which then joins the Mississippi. The Republican and Smoky Hill Rivers join in Kansas to form the Kansas River, which then flows into the Missouri and thence the Mississippi. All other significant Colorado rivers that don't join one of the above either wind up in the Rio Grande or the Colorado River, neither of which ever joins the Mississippi.
The answer is... A river only flows down hill
Poteatu river
The black river flows north to south. The nile river is the only river in the world that flows south to north.
Kansas and Missouri share the city of Kansas City, with only a river between them.
St.Lawerence?
The Ebro River.
Only Niobara River.
some junk like that that is a river
Kansas is a US state that only borders other US states : Nebraska, Colorado, Oklahoma, and Missouri.
nile