GeotchaA geography quiz on a real globe
25 longest tributaries of the Missouri
25 tributaries, 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 tributaries
- 1Milk River1,173 km
- 2James (Dakotas)1,143 km
- 3Yellowstone1,114 km
- 4White River (Missouri River tributary)933 km
- 5Niobrara915 km
- 6Little Missouri River901 km
- 7Big Sioux River674 km
- 8Musselshell570 km
- 9Platte499 km
- 10Cheyenne475 km
- 11Heart475 km
- 12Gasconade450 km
- 13Osage444 km
- 14Chariton351 km
- 15Moreau320 km
- 16Big Muddy Creek307 km
- 17Madison295 km
- 18Platte (Iowa and Missouri)275 km
- 19Poplar (Montana–Saskatchewan)269 km
- 20Kansas River238 km
- 21Judith220 km
- 22Cannonball217 km
- 23Sun River209 km
- 24Smith200 km
- 25Jefferson134 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. Tributaries: the rivers that flow straight into the Missouri, as Wikidata records where each river flows (P403) or which rivers flow into it (P974). A named stretch of the Missouri (the Solimões of the Amazon) counts as the Missouri; a river that reaches it through a lake or through a river too short for this pool is in its basin, not one of its tributaries. Their own tributaries are left out.
On the map
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