Hwy 36 - Red Bluff to Fortuna. 150 miles of bitchin'ness.
Briceland/Shelter Cove Road - 101 to Shelter Cove. You'll probably not meet a car for all 40 miles.
Grayback Road - Happy Camp, CA to O'Brian Oregon. 35 miles. Don't wreck or break down.... Banjos music out here.