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.
Arnold Creek (West Virginia) Arnold Creek is a tributary of Middle Island Creek, 10.9 mi long, in West Virginia in the United States. Via Middle Island Creek and the Ohio River, it is part of the watershed of the Mississippi River, draining an area of 34.7 sqmi in a rural region on the unglaciated portion of the Allegheny Plateau.