Tenasillahe Island

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Tenasillahe Island
Columbia River 07787.JPG
Tenasillahe Island can be seen in the lower central portion of the image.
Coordinates46°13′45″N 123°27′22″W / 46.22917°N 123.45611°W / 46.22917; -123.45611Coordinates: 46°13′45″N 123°27′22″W / 46.22917°N 123.45611°W / 46.22917; -123.45611
Adjacent bodies of waterColumbia River
Highest elevation2 m (7 ft)
Map of Tenasillahe and Welch Islands

Tenasillahe Island is an island in the Columbia River Estuary portion of the Columbia River in Clatsop County, Oregon.[1] It is separated from the mainland and the unincorporated community of Clifton, Oregon by the Clifton Channel, and from nearby Welch Island by the Red Slough.[2]

The island was visited by the Lewis and Clark Expedition, and Tenasillahe and Welch were known as the "Marshy Islands".

The entire island is part of the Julia Butler Hansen Refuge for the Columbian White-tailed Deer.


The name "Tenasillahe Island" is tautological, in that "Tenasillahe" means "island" in the Chinook language.


  1. ^ "Tenasillahe Island Restoration Project". U.S. Fish and Wildlife Service. February 14, 2012. Retrieved November 13, 2016.
  2. ^ "Tenasillahe Island". The Columbia River – A Photographic Journey. August 2012. Retrieved November 13, 2016.