| Tributaries | River | % Correct |
|---|---|---|
| Minnesota, Wisconsin, Illinois, White, Des Moines, Yazoo, Iowa, Ohio, Missouri | Mississippi | 92%
|
| Río Puerco, Pecos, Río Conchos, Río Salado, San Juan, Santa Fe, Rio Chama | Rio Grande/ Río Bravo | 90%
|
| Snake, Willamette, Kootenay, Pend Oreille, Cowlitz, Spokane, Lewis | Columbia | 76%
|
| Platte, Kansas, Milk, James, Yellowstone, White, Niobrara | Missouri | 76%
|
| Cumberland, Tennessee, Muskingum, Monongahela, Allegheny, Wabash, Kanawha | Ohio | 76%
|
| Green, Fraser, San Juan, Dolores, Gila, Gunnison, Escalante | Colorado | 68%
|
| Shenandoah, Antietam Creek, South Branch, North Branch, Monocacy, Bull Run, Occoquan | Potomac | 67%
|
| Catskill Creek, Mohawk, Hoosic, Schroon, Sacandaga, Croton, Rondout Creek | Hudson | 65%
|
| Clearwater, Palouse, Owyhee, Malheur, Salmon, Henrys Fork, Boise | Snake | 58%
|
| Andreafsky, Tanana, Koyukuk, White, Porcupine, Klondike, Innoko | Yukon | 57%
|
| Schuylkill, Lehigh, Christina, Neversink, Musconetcong, Lackawaxen, Maurice | Delaware | 47%
|
| Prairie Dog Town Fork, Salt Fork, North Fork, Pease, Washita, Kiamichi, Ouachita/Black | Red River of the South | 39%
|
| Cimarron, Canadian, Neosho, Salt Fork, Verdigris, Pawnee, Walnut | Arkansas | 33%
|
| Assiniboine, Bois de Sioux, Wild Rice, Sheyenne, Roseau, Buffalo, Pembina | Red River of the North | 30%
|
| Powder, Tongue, Bighorn, Stillwater, Boulder, Lamar, Shields | Yellowstone | 29%
|
| Lackawanna, Juniata, Conestoga, Mahanoy, Swatara, West Branch, Unadilla | Susquehanna | 27%
|
| Cowpasture, Jackson, Appomattox, Chickahominy, Nansemond, Warwick, Pagan | James | 26%
|
| Tallapoosa, Coosa, Cahaba | Alabama | 25%
|
| French Broad, Holston, Clinch, Hiwassee, Elk, Duck, Sequatchie | Tennessee | 25%
|
| Passumpsic, Chicopee, Deerfield, Ammonoosuc, Westfield, Farmington, Millers | Connecticut | 20%
|
| American, Butte Creek, Feather, Deer Creek, Cottonwood Creek, Putah Creek, Cache Creek | Sacramento | 15%
|
| Tugaloo, Seneca, Rocky, Little, Chattooga, Broad, Brier Creek | Savannah | 13%
|
| Elk, Pocatalico, New, Gauley, Coal | Kanawha | 11%
|
| Chattahoochee, Flint, Chipola | Apalachicola | 9%
|
| Caney Fork, Martins Fork, Big South Fork, Clear Fork, Red, Obey, Rockcastle | Cumberland | 9%
|
| Allagash, Aroostook, Kennebecasis, Tobique, Jemseg, Baker Branch, Madawaska | Saint John | 9%
|
| Kwethluk, Holitna, Aniak, Swift, Stony, Kisaralik, Gweek | Kuskokwim | 5%
|
| Alapaha, Withlacoochee, Santa Fe | Suwannee | 5%
|
| Flat, Rogue, Thornapple, Maple, Looking Glass, Red Cedar, Plaster Creek | Grand | 4%
|
| Big Otter, Falling, Dan, Pigg, Otter | Roanoke (Staunton) | 4%
|