This should be a quick find along a lovely section of the fabled Skyline-to-the-Sea Trail that runs parallel to Opal Creek, which was flowing with impressive gusto on an early February visit.
Trail maps suggest the existence of connector trails across the creek over to N. Escape Road, but that's obviously a non-starter during rainy season. It also looks like most side trails have been fully overgrown in the aftermath of the 2020 CZU fire.
Please replace as found.