An Associated Press story in the Mercury News travel section suggests taking a scenic drive from the coast to Lassen Volcanic National Park:

Looking for a road trip getaway? Consider heading for the far northern end of California and taking a scenic drive along the Trinity River, following a highway that connects volcano country in the east to the Pacific Coast in the west. You might want to plot your travels ahead of time because there are plenty of side trips and other distractions that will demand your attention.


You can get there by driving north up the Sacramento Valley on Interstate 5 to Redding