GeotchaA geography quiz on a real globe

16 longest rivers in Iowa

16 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. 1Mississippi3,766 km
  2. 2Missouri3,726 km
  3. 3Des Moines845 km
  4. 4Wisconsin692 km
  5. 5Big Sioux River674 km
  6. 6Iowa520 km
  7. 7Platte499 km
  8. 8Wapsipinicon480 km
  9. 9Rock River459 km
  10. 10Chariton351 km
  11. 11Raccoon322 km
  12. 12Platte (Iowa and Missouri)275 km
  13. 13Upper Iowa River251 km
  14. 14Turkey241 km
  15. 15Maquoketa240 km
  16. 16Rock River (Big Sioux River tributary)232 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 16 longest rivers in Iowa, 16 rivers: each one marked on the globe

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