Colorado river
Southwestern USA
Rocky Mountain nation park to gulf of California
Grand Canyon river
Hoover dam (lake mead) glen canyon dam (lake Powell)
Mississippi
Second longest in n. America
“Father of waters”
Lake itasca Minnesota to Gulf of Mexico
Minneapolis, St. Louis, Memphis, New Orleans
Ohio river
Central-east (border between north and south)
Pittsburgh (allegheny and monongahela river join) flows to Cairo Illinois and joins Mississippi
Wheeling, Cincinnati, Louisville, Evansville