GeotchaA geography quiz on a real globe

22 longest rivers in Colorado

22 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. 1Rio Grande3,051 km
  2. 2Arkansas2,364 km
  3. 3Colorado2,334 km
  4. 4Green River1,175 km
  5. 5North Platte River1,152 km
  6. 6Cimarron1,123 km
  7. 7Smoky Hill River925 km
  8. 8South Platte River707 km
  9. 9San Juan616 km
  10. 10Laramie451 km
  11. 11Yampa402 km
  12. 12Dolores400 km
  13. 13Purgatoire315 km
  14. 14White River (Green River tributary)314 km
  15. 15Gunnison290 km
  16. 16Bear Creek260 km
  17. 17Two Butte Creek245 km
  18. 18Little Snake River241 km
  19. 19Apishapa224 km
  20. 20Horse Creek (Colorado)208 km
  21. 21Animas203 km
  22. 22Cache la Poudre203 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. An item counts for every first-level unit (state, province, county) it touches: a lake or island by its outline, a river by its course, within about 1.5 km; a summit, a cape or anything without a shape by its point.

On the map

Map of 22 longest rivers in Colorado, 22 rivers: each one marked on the globe

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