
The Columbia River dominates this landscape, serving as a liquid border between Washington and Oregon. The river's complexity is revealed through an intricate system of channels and sloughs, including the Cathlamet Channel and Westport Slough, which weave around prominent landmasses like Puget Island and Wallace Island. These low-lying areas provide critical habitat, notably within the Julia Butler Hansen Refuge for the Columbian White-Tailed Deer.
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