The North Fork Clackamas River is a tributary, about long, of the Clackamas River in the U.S. state of Oregon. Originating at nearly above sea level on the west side of the Cascade Range, it flows westward through Mount Hood National Forest. It joins the Clackamas at North Fork Reservoir, about from the larger river's confluence with the Willamette River. From source to mouth, the following tributaries enter the river: Dry Creek from the right bank, Boyer Creek from the left bank, then Whiskey, Bedford, Bee, and Fall creeks, all from the right.