[1] Paralleling the basic route of the Willapa River, the highway turns southeast to leave Raymond and become unnamed.

In Pe Ell, SR 6 is named 4th Avenue and crosses the Chehalis River, while the highway is once again unnamed at the Main Street intersection.

[1] At the Main Street intersection, the roadway is realigned north to Doty and east to Dryad and Rainbow Falls State Park, where the road goes south and curves northeast to Adna.

[10] A gravel road was built through the Willapa Hills in 1917, but had steep switchbacks and frequent damage from storms.

[18] Following a major winter storm in December 2007, an 8-mile (13 km) section of SR 6 near Pe Ell was closed due to landslides and an unstable slope above the highway.

[19] The roadway was reopened for limited access by the end of the month while work began on clearing debris on the unstable slope.

[24][25] The new bridge, measuring 40 feet (12 m) wide, was constructed to the north of the existing structure and was opened to traffic in September 2009.