Big Muddy Creek (Missouri River tributary) Big Muddy Creek (Missouri River tributary) Big Muddy Creek is a tributary of the Missouri River, approximately 191 mi (307 km) long, in the Canadian province of Saskatchewan and the U.S. state of Montana. It flows through the Big Muddy Badlands. It rises in southern Saskatchewan at Willow Bunch Lake, on the plains north of the international border and approximately 20 mi (32 km) northwest of Big Beaver. It flows southeast through the Big Muddy Badlands and through Big Muddy Lake, then south into Sheridan County, Montana, past Redstone, then east, past Plentywood, then south, forming the eastern border of
Egypt River been observed since the 1970s. Egypt River The Egypt River is a stream in Ipswich, Massachusetts, United States. The river is formed by the confluence of Bull and Dow brooks below their reservoirs, and in turn joins the Muddy River and then the Rowley River, which empties into the Plum Island Sound. The Rowley River runs through salt marshes, in which it forms a narrow and winding inlet about in total length. The name "Egypt River" is recorded as early as 1635. In early colonial times, it was also termed the "North River". It was then a source of herring