| River | Country | % Correct |
|---|---|---|
| St. Lawrence | Canada / United States | 90%
|
| St. Croix | Canada / United States | 88%
|
| St. John | Canada / United States | 88%
|
| St. Mary's | Canada / United States | 86%
|
| Reindeer | Canada / United States | 83%
|
| Detroit | Canada / United States | 83%
|
| St. Clair | Canada / United States | 81%
|
| Halls Stream | Canada / United States | 81%
|
| Kelly Rapids | Canada / United States | 81%
|
| Rio Hondo | Mexico / Belize | 81%
|
| Rio Chixoy | Mexico / Guatemala | 79%
|
| Suchiate | Mexico / Guatemala | 76%
|
| Rio Paz | El Salvador / Guatemala | 69%
|
| Rio Goascoran | El Salvador / Honduras | 69%
|
| Rio Coco | Honduras / Nicaragua | 69%
|
| Usumacinta | Mexico / Guatemala | 69%
|
| Sumpul | El Salvador / Honduras | 67%
|
| Rio San Juan | Nicaragua / Costa Rica | 67%
|
| Lempa | El Salvador / Honduras | 64%
|
| Rio Sixaola | Costa Rica / Panama | 62%
|