Rivers of the United States (350 or more miles long) Alabama-Coosa(600 mi.; 966 km): From junction of Oostanula and Etowah R. in Georgia to Mobile R. Altamaha-Ocmulgee(392 mi.; 631 km): From junction of Yellow R. and South R., Newton Co. in Georgia to Atlantic Ocean. Apalachicola- Chattahoochee(524 mi.; 843 km): From Towns Co. in Georgia to Gulf of Mexico in Florida. Arkansas(1,459 mi.; 2,348 km): From Lake Co. in Colorado to Mississippi R. in Arkansas. Brazos(923 mi.; 1,490 km): From junction of Salt Fork and Double Mountain Fork in Texas to Gulf of Mexico. Canadian(906 mi.; 1,458 km): From Las Animas Co. in Colorado to Arkansas R. in Oklahoma. Cimarron(600 mi.; 966 km): From Colfax Co. in New Mexico to Arkansas R. in Oklahoma. Colorado(1,450 mi.; 2,333 km): From Rocky Mountain National Park in Colorado to Gulf of California in Mexico. Colorado(862 mi.; 1,387 km): From Dawson Co. in Texas to Matagorda Bay. Columbia(1,243 mi.; 2,000 km): From Columbia Lake in British Columbia to Pacific Ocean (entering between Oregon and Washington). Colville(350 mi.; 563 km): From Brooks Range in Alaska to Beaufort Sea. Connecticut(407 mi.; 655 km): From Third Connecticut Lake in New Hampshire to Long Island Sound in Connecticut. Cumberland(720 mi.; 1,159 km): From junction of Poor and Clover Forks in Harlan Co. in Kentucky to Ohio R. Delaware(390 mi.; 628 km): From Schoharie Co. in New York to Liston Point, Delaware Bay. Gila(649 mi.; 1,044 km): From Catron Co. in New Mexico to Colorado R. in Arizona. Green(360 mi.; 579 km): From Lincoln Co. in Kentucky to Ohio R. in Kentucky. Green(730 mi.; 1,175 km): From Sublette Co. in Wyoming to Colorado R. in Utah. Illinois(420 mi.; 676 km): From St. Joseph Co. in Indiana to Mississippi R. at Grafton in Illinois. James(sometimes calledDakota) (710 mi.; 1,143 km): From Wells Co. in North Dakota to Missouri R. in South Dakota. Kanawha-New(352 mi.; 566 km): From junction of North and South Forks of New R. in North Carolina, through Virginia and West Virginia (New R. becoming Kanawha R.), to Ohio R. Kansas(743 mi.; 1,196 km): From source of Arikaree R. in Elbert Co., Colorado, to Missouri R. at Kansas City, Kansas. Koyukuk(470 mi.; 756 km): From Brooks Range in Alaska to Yukon R. Kuskokwim(724 mi.; 1,165 km): From Alaska Range in Alaska to Kuskokwim Bay. Licking(350 mi.; 563 km): From Magoffin Co. in Kentucky to Ohio R. at Cincinnati in Ohio. Little Missouri(560 mi.; 901 km): From Crook Co. in Wyoming to Missouri R. in North Dakota. Milk(625 mi.; 1,006 km): From junction of forks in Alberta Province to Missouri R. Mississippi(2,348 mi.; 3,779 km): From Lake Itasca in Minnesota to mouth of Southwest Pass in Louisiana. Mississippi-Missouri-Red Rock(3,710 mi.; 5,970 km): From source of Red Rock R. in Montana to mouth of Southwest Pass in Louisiana. Missouri(2,315 mi.; 3,726 km): From junction of Jefferson R., Gallatin R., and Madison R. in Montana to Mississippi R. near St. Louis. Missouri-Red Rock(2,540 mi.; 4,090 km): From source of Red Rock R. in Montana to Mississippi R. near St. Louis. Mobile-Alabama-Coosa(645 mi.; 1,040 km): From junction of Etowah R. and Oostanula R. in Georgia to Mobile Bay. Neosho(460 mi.; 740 km): From Morris Co. in Kansas to Arkansas R. in Oklahoma. Niobrara(431 mi.; 694 km): From Niobrara Co. in Wyoming to Missouri R. in Nebraska. Noatak(350 mi.; 563 km): From Brooks Range in Alaska to Kotzebue Sound. North Canadian(800 mi.; 1,290 km): From Union Co. in New Mexico to Canadian R. in Oklahoma. North Platte(618 mi.; 995 km): From Jackson Co. in Colorado to junction with South Platte R. in Nebraska to form Platte R. Ohio(981 mi.; 1,579 km): From junction of Allegheny R. and Monongahela R. at Pittsburgh to Mississippi R. between Illinois and Kentucky. Ohio-Allegheny(1,306 mi.; 2,102 km): From Potter Co. in Pennsylvania to Mississippi R. at Cairo in Illinois. Osage(500 mi.; 805 km): From east-central Kansas to Missouri R. near Jefferson City in Missouri. Ouachita(605 mi.; 974 km): From Polk Co. in Arkansas to Red R. in Louisiana. Pearl(411 mi.; 661 km): From Neshoba County in Mississippi to Gulf of Mexico (Mississippi-Louisiana). Pecos(926 mi.; 1,490 km): From Mora Co. in New Mexico to Rio Grande in Texas. Pee Dee-Yadkin(435 mi.; 700 km): From Watauga Co. in North Carolina to Winyah Bay in South Carolina. Pend Oreille–Clark Fork(531 mi.; 855 km): Near Butte in Montana to Columbia R. on Washington-Canada border. Platte(990 mi.; 1593 km): From source of Grizzly Creek in Jackson Co., Colorado, to Missouri R. south of Omaha, Nebraska. Porcupine(569 mi.; 916 km): From Yukon Territory, Canada, to Yukon R. in Alaska. Potomac(383 mi.; 616 km): From Garrett Co. in Maryland to Chesapeake Bay at Point Lookout in Maryland.