Maumee Valles

The Maumee Valles are a set of channels in an ancient river valley in the Lunae Palus quadrangle of Mars, located at 19.7° N and 53.2° W.  They are 350 km long and were named after a North American river in Indiana and Ohio.

Together with other ancient river valleys, they have provided strong evidence for a great deal of running water on the surface of Mars.