Kelley Point Park
Bounded by the Columbia Slough on the south , the Willamette River on the west , and the Columbia River on the north , the park forms the tip of the peninsula at the confluence of the rivers . 
<triplet> Columbia Slough <subj> Willamette River <obj> mouth of the watercourse <triplet> Willamette River <subj> Columbia River <obj> mouth of the watercourse <triplet> Columbia River <subj> Willamette River <obj> tributary