The Mississippi River forms the eatern border. The St. Frances River form a small part of the border on the northeast. The Red River forms a small part of the southwestern border.
Two rivers partially form Illinois State's Eastern boundary. The Wabash River is one river that forms Illinois' boundary. The Ohio River is the other river that forms the state's boundary.
It is the Danube River.
The Ural Mountains,the Ural river,and the Caspian Sea.
Red River
The Rio Grande River.
the Delaware river
western
The Ural Mountains and the Ural River in Russia are the mountains and river that form most of the northern boundary between Europe and Asia.
The Ohio river
The two rivers that partially form the eastern boundary of the United States are the Mississippi River and the St. Lawrence River. The Mississippi River flows southward from Minnesota to the Gulf of Mexico, serving as a significant boundary for several states. The St. Lawrence River, situated in the northeastern part of the country, forms part of the boundary between the United States and Canada.
Europe's eastern boundary is formed by the Caspian Sea, Ural River and Ural Mountains. The border also runs through the countries of Russia and Turkey.
The Clare river is a river running in the counties of Mayo and Galway. The main river in county Clare is the river Fergus. However, the river Shannon, the longest river in Ireland form the eastern boundary of county Clare and its estuary forms the southern boundary,