Yalobusha River, river that rises in north-central Mississippi, U.S., and flows 80 miles (130 km) southwest to unite with the Tallahatchie River and form the Yazoo River. Grenada Dam (1947) impounds Grenada Lake, a flood-control reservoir, which also receives the Yalobusha’s chief tributary, the Skuna River. Hugh White State Park is on the southern shore of the reservoir.