Umatilla River runs through Umatilla County, Oregon State, roughly 250 km east of
Portland. It is a tributary of the Columbia, from which it branches off southernly at Umatilla City.
The Colonial Despatches Team.
Umatilla River.The Colonial Despatches of Vancouver Island and British Columbia 1846-1871, Edition 2.0, ed. The Colonial Despatches Team. Victoria, B.C.: University of Victoria.
https://bcgenesis.uvic.ca/umatilla_river.html.
Last modified: 2020-03-30 13:22:16 -0700 (Mon, 30 Mar 2020) (SVN revision: 4193)