Well you have to go over to the coast from yreka then up on 101 to the redwood forest
It depends, i wouldn't make both into one day trip, there is just too much to see in each and they are too far apart to do that. Could you do both in a single weekend? Absolutely but you would be doing both a disservice.
3-4 hours drive
There pretty close to each other
It's a pretty large area. Klamath river flows into the ocean by crescent city, North of the redwoods national park area. The forest area expands all through northern California and up to about where the town of Klamath Falls is located.
Depends 100
Not to far 100ish miles maybe 150
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