Rivers of the USA

1

Longest river in North America, tributary of #2

2

River of Tom Sawyer

3

Part of the "rich man's route" to the Klondike

4

Illegal immigrants cross this river

5

Very little of this river's water actually reaches its mouth

6

Second longest tributary of #2

7

Two famous explorers reached the ocean at this river's mouth

8

But remember this colorful river's valley in a famous cowboy song

9

Flows through the deepest canyon in North America

10

Two rivers go into Pittsburgh, this one comes out

11

Don't mistake this river for the longer #5

12

Flows from Knoxville, through a state with the same name, to #10

13

Curiously, this river does not even flow through Canada

14

Longest river entirely in Texas

15

Powell floated this colorful river before #5

16

Longest tributary of #4, shares its name with a fictional cowboy

17

Several rivers of this colorful name flow around the country, but this Arkansas-Missouri river is the longest

18

Sometimes called the Dakota River, it empties into #1

19

Longest river entirely in Alaska, it is not a tributary of #3

20

Namesake of a particularly dangerous shortcut on the Santa Fe Trail