Lewis River/Quartz Creek Trailhead provides access to the Lewis River Trail by heading SW and the Quartz Creek Trail heading NE from the trailhead.
FS Directions: From Cougar, WA drive east on Forest Road 90 for about 35 miles to the Quartz Creek Bridge. The trailhead is on the left. https://www.fs.usda.gov/recarea/giffordpinchot/recarea/?recid=31582