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.
Williams River (West Virginia) The Williams River is a tributary of the Gauley River, 33 miles (53 km) long, in east-central West Virginia, USA. Via the Gauley, Kanawha and Ohio Rivers, it is part of the watershed of the Mississippi River, draining an area of 132 square miles (342 km²) in a sparsely populated region of the southern Allegheny Mountains and the unglaciated portion of the Allegheny Plateau.