The ledge terminates in a waterfall in Riley County, Kansas, USA.
Below Pillsbury Crossing, Deep Creek flows into the Kansas River.
The waterfall is named for Josiah Pillsbury, a Free-State settler in Kansas Territory who homesteaded near the crossing in 1855.
Pillsbury was a member of the Free-State Topeka Legislature and the failed Leavenworth Constitutional Convention.
The site is part of Pillsbury Crossing Wildlife Area.