 The mouth is the confluence with the Susquehanna River at an elevation of at the border of Dauphin and Lancaster counties, just south of Three Mile Island in the river and just north of the unincorporated village of Falmouth in Conoy Township, Lancaster County.The name of the creek comes from the Lenape, meaning "at the rapids".The rapids are the Conewago Falls in the Susquehanna River, which also give their name to the other Conewago Creek, whose mouth is on the west bank of the Susquehanna River in York County, only south of the mouth of this Conewago Creek.