GeotchaA geography quiz on a real globe

25 longest rivers of the Columbia basin

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. 1Columbia2,000 km
  2. 2Snake River1,735 km
  3. 3Kootenay780 km
  4. 4Salmon River684 km
  5. 5Owyhee557 km
  6. 6Clark Fork499 km
  7. 7John Day452 km
  8. 8Deschutes406 km
  9. 9Yakima350 km
  10. 10Malheur306 km
  11. 11Willamette301 km
  12. 12Grande Ronde293 km
  13. 13Kettle282 km
  14. 14Palouse269 km
  15. 15Flathead254 km
  16. 16Bruneau246 km
  17. 17North Fork Flathead River246 km
  18. 18Crooked233 km
  19. 19Saint Joe225 km
  20. 20Big Wood River220 km
  21. 21Elk River220 km
  22. 22Blackfoot (Idaho)215 km
  23. 23North Fork Clearwater River215 km
  24. 24Pend Oreille209 km
  25. 25Duncan206 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. Rivers in Antarctica are left out unless the quiz includes Antarctica. The Columbia basin: the Columbia and every river here that flows into it, directly or through other rivers and lakes, following where Wikidata says each river flows (P403) downstream.

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