What is the length of the River which has Wild Horse Creek as a tributary ?
Powder River (Wyoming and Montana) Powder River is a tributary of the Yellowstone River, approximately 375 mi long in northeastern Wyoming and southeastern Montana in the United States. It drains an area historically known as the Powder River Country on the high plains east of the Bighorn Mountains.
Mill Creek (Susquehanna River) Mill Creek is a tributary of the Susquehanna River in Luzerne County, Pennsylvania in the United States. It is 8.7 mi long. Its watershed is approximately 36 square miles in area. The creek flows through Plains Township, Bear Creek Township, and Wilkes-Barre.