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Tilton River facts for kids

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Tilton River
Country United States
State Washington
County Lewis
Physical characteristics
Main source Gifford Pinchot National Forest
north of Morton
3,035 ft (925 m)
River mouth Cowlitz River
Lake Mayfield
427 ft (130 m)
Length 29 mi (47 km)
  • Location:
    Cinebar, Washington
  • Minimum rate:
    50 cuft/s
  • Average rate:
    979.8 cuft/s
  • Maximum rate:
    1,200 cuft/s
Basin features
Basin size 154 sq mi (400 km2)

The Tilton River is a tributary of the Cowlitz River, in the U.S. state of Washington. Named for territorial surveyor James Tilton, it flows for about 29 miles (47 km), entirely within Lewis County.


The Tilton River originates in the Cascade Range just north of Mount St. Helens and southwest of Mount Rainier. It flows south and west, joining the Cowlitz River in Lake Mayfield, near Mossyrock.

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