GeotchaA geography quiz on a real globe

17 longest rivers in Idaho

17 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. 1Snake River1,735 km
  2. 2Bear River790 km
  3. 3Kootenay780 km
  4. 4Salmon River684 km
  5. 5Owyhee557 km
  6. 6Clark Fork499 km
  7. 7Malheur306 km
  8. 8Grande Ronde293 km
  9. 9Palouse269 km
  10. 10Bruneau246 km
  11. 11Saint Joe225 km
  12. 12Big Wood River220 km
  13. 13Blackfoot (Idaho)215 km
  14. 14North Fork Clearwater River215 km
  15. 15Pend Oreille209 km
  16. 16South Fork Owyhee River205 km
  17. 17Henrys Fork204 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 17 longest rivers in Idaho, 17 rivers: each one marked on the globe

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