Collawash River
Oregon
The Collawash River is a major tributary to the Clackamas River on the west slopes of the Cascade Range in northwest Oregon. The scenic segment flows through a narrow, steeply sloped, well-dissected canyon that contains several cliffs and talus slopes. The river flows over and around many rocks, through pools, and over one waterfall approximately 20-feet high.
Designated Reach
March 30, 2009. From the headwaters of the East Fork of the Collawash River to Buckeye Creek.
Outstandingly Remarkable Values
Fish
The river provides excellent spawning habitat for anadromous fish throughout the segment. The steep cascade area located in the lower portion of the segment acts as a partial barrier for most anadromous fish, though some have been known to migrate beyond it. Rainbow trout is the major resident sp...Show More
Geology
In the recreational segment of the river there are a number of unstable earth flows. There is one area which could be considered a "textbook" example of a very active earth flow and could be easily interpreted.