Quote Originally Posted by UKCraig View Post
Redding and Lassen Volcanic NP seem to be considerably to the south of Redwood NP.
Not really, if you look at a globe, Lassen is less than a degree south of Redwood Np ( ~41.058 N versus 40.572 N)
Having said all that, I would love to have the opportunity to drive at least some of US-1 from Eureka down to San Francisco. I'd not even considered this but maybe it's possible?
If you elect to do the Lake Tahoe route, I would suggest that you use US-101 to Cloverdale and then diagonal northwest on CA-128 and stop for some brews at the Boonville brewery before reaching the coast at Albion and then north to Mendocino and on up the coast.

Mark