The third day of our journey was the big adventure day of the trip. We started the morning in Fortuna and got an early start heading out through Ferndale towards the coast.
If KTSoTR will allow me I would like to redisplay the map that he posted when I was gathering information to plan this trip. The route we followed is identified as 335 on the map and I would say with a fair level of confidence that the only thing that has changed since that map was printed in 1915 was a short section that was realigned near Petrolia, maybe a slight bit of road widening, and it does now have asphalt.
We followed 335 to Petrolia and then took the road, Lighthouse Road, that goes to the beach.

Mattole Road rises, dips, winds, sways, and shimmies its way over the coast mountains that lie southeast of Ferndale and finally emerges at the Pacific Ocean at Cape Mendocino.
Mattole Road at Cape Mendocino
Petrolia is primarily an agricultural community with ranches in the surrounding area. Although, it is also the site of California's first oil well which was drilled in the 1850's. We stopped at the General Store in Petrolia for sandwich fixins before continuing onto Lighthouse Road and Mattole Beach.
Mattole Beach
After lunch at Mattole Beach we got back in the truck and took a single lane dirt road over the hill towards the location of the Punta Gorda Lighthouse. The 4x4 wasn't needed but comforting to have anyway. The last section of road wound down a steep hill to the trailhead of the hike to the lighthouse. We parked on a bluff overlooking the ocean where my wife and daughter stayed and read a book while enjoying the million dollar view of the ocean while my son and I went for a hike.
Rocky at Punta Gorda
Looking Down the Bluff at Punta Gorda
I estimate that the winds blowing on the top of the bluff were gusting in the 50's range. My son and I hiked down the trail to the beach which was easy and I didn't allow myself to think about the 500 feet that I would eventually hike back up. The lighthouse, or what remains of the lighthouse, is a mile further south.
Rusted Buoy on the Beach with the Punta Gorda Lighthouse in the Background 
The Punta Gorda Lighthouse was built in 1912 and shut down in 1951 when it was deemed no longer necessary. There are foundations for the three lightkeepers quarters which were burned down to prevent squatters in the 60's.
Punta Gorda Lighthouse Overlooking the Pacific Ocean
We hiked back along the beach, up the bluff, and drove back out towards civilization the way we had come. I realized on the drive back through Petrolia and along Mattole Road that I was getting a wave from the drivers of the cars that we were passing. It was just a slight raise of the hand with the palm still resting on the steering wheel. I found it very friendly and to make sure I fit in I started reciprocating the gesture. It was much different than the gestures I get driving the freeway at home.
We did stop for a few minutes to walk through the Victorian town of Ferndale on the way back. Unfortunately it was late in the day and most of the shops were closing up. We were also tired and hungry and ready to get to a motel room in Eureka.
Roadhound