From the trailhead, take the Quinault Loop Trail for about one mile where you'll see a blank signboard on the right. (If you reach the turnpike through the Cedar Bog, you've gone too far.) The Willaby Creek trail starts behind the signboard, while the main loop trail curves off to the left.
You'll quickly be bushwhacking through salal and sword fern, and will soon see some overgrown signage and other indications of the previously maintained trail. After a quarter of a mile from the start of this trail, you'll step up to a neat feature of the old trail: a large tree with one side shaved down to make a tread across a bog.
You'll then see the main obstruction: a massive five-foot diameter trunk laying perpendicular to the path and blocking the trail. The trunk has no bark so is very slippery, and it's so long that there's no easy path around it.