Written Directions
Stewart Point (south of Ft. Bragg, CA) to Geyserville, CA. This is 43 miles of curvy and twisty roads. Starting in Stewarts Point go inland on Skaggs Spring Rd. There is no street sign I could see. It looks like a driveway across from the only gas station in this 50 person town. Stay on this road for 37 miles, then turn right on Dry Creek Rd for 3 miles. Turn left on Canyon Rd which takes you under I -101 to Geyserville and if you want on to Calistoga on CA 128.
Scenery
This starts on the Pacific Coast Hwy and goes over the Coastal Range for about 40 miles. It's gorgeous hilly country with curvy roads - actually more fun than CA 36 ("Twisty Roads 140 miles" - Red Bluff to Eureka.) The first 4 miles or so are a glorified driveway going through forests with sharp turns, then the road opens up to 36 miles of mostly sweeping curves on very good roads. Some far off lake vistas.
Drive Enjoyment
The first 4 miles are narrow - really a glorified 1.5 lane driveway but still in good condition. Then it opens up into a well maintained CA highway that you will have no problems with. Very little traffic - one car and one motorcycle going my direction, a few more cars going towards Stewart Point at 5 pm Friday night in late October.
Tourism Opportunities
There is virtually nothing on this route - no gas, no restaurants, etc. In the first 4 miles you will encounter a few houses and a tiny school/day care center. (?) After that, there are just glorious curvy roads