GeotchaA geography quiz on a real globe

25 longest rivers of the Lena 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. 1Lena4,294 km
  2. 2Vilyuy2,650 km
  3. 3Aldan2,273 km
  4. 4Vitim1,837 km
  5. 5Amga1,462 km
  6. 6Olyokma1,436 km
  7. 7Markha1,181 km
  8. 8Tyung1,092 km
  9. 9Maya1,053 km
  10. 10Chara851 km
  11. 11Morkoka841 km
  12. 12Uchur812 km
  13. 13Linde804 km
  14. 14Chona802 km
  15. 15Nyuya798 km
  16. 16Yudoma765 km
  17. 17Tyukyan747 km
  18. 18Muna715 km
  19. 19Tsipa692 km
  20. 20Gonam686 km
  21. 21Kirenga669 km
  22. 22Ygyatta601 km
  23. 23Sinyaya597 km
  24. 24Allakh-Yun586 km
  25. 25Nyukzha583 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 Lena basin: the Lena and every river here that flows into it, directly or through other rivers and lakes, following where Wikidata says each river flows (P403) downstream.

On the map

Map of 25 longest rivers of the Lena basin, 25 rivers: each one marked on the globe

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