GeotchaA geography quiz on a real globe

25 longest rivers in the American West

25 rivers, each one drawn on a satellite globe. Name it when it lights up, find it when you are given its name, or type every one you can remember in Name all.

Free to play, with no account needed. What you miss comes back for review until it sticks.

The rivers

  1. 1Missouri3,726 km
  2. 2Yukon3,190 km
  3. 3Rio Grande3,051 km
  4. 4Arkansas2,364 km
  5. 5Colorado2,334 km
  6. 6Columbia2,000 km
  7. 7Snake River1,735 km
  8. 8Pecos1,560 km
  9. 9Canadian1,458 km
  10. 10Green River1,175 km
  11. 11Milk River1,173 km
  12. 12North Platte River1,152 km
  13. 13Kuskokwim1,130 km
  14. 14Cimarron1,123 km
  15. 15Yellowstone1,114 km
  16. 16Gila1,044 km
  17. 17Tanana940 km
  18. 18Smoky Hill River925 km
  19. 19Porcupine916 km
  20. 20Niobrara915 km
  21. 21Little Missouri River901 km
  22. 22Innoko805 km
  23. 23Koyukuk805 km
  24. 24Bear River790 km
  25. 25Kootenay780 km

Length in km as Wikidata records it (P2043, the best-ranked figure). Each named river counts on its own: the river that carries the name, from its source to its mouth. Headstreams and tributaries with names of their own are rivers of their own, so the Missouri and the Mississippi are two rivers here, as are the Irtysh and the Ob (the Longest River Systems set measures such chains as one system, from the most distant source). A named section of a river is that river: the Solimões, as the Amazon’s upper course is called in Brazil, is the Amazon. Where the recorded length runs from a differently named headwater (the Congo’s from the Lualaba’s source), the course is drawn on up that headwater. Rivers under 200 km are in only when they are well known (30 or more Wikipedia editions), and a river whose mapped course covers under half its recorded length is left out. The American West: the US Census West, 13 states from Montana and New Mexico to the Pacific, Alaska and Hawaii. Places are by geography: what lies in a dependency counts for its own region (Puerto Rico’s islands are the Caribbean’s, Réunion’s Africa’s), and Hawaii is in Polynesia.

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