There are still several drive thru trees in Humboldt and Mendocino counties.
Yes, it's possible
Just came through from Houston in way to Seattle. Ave of Giants was well worth it. Absolutely worth staying at Elk Prairie. I suggest a camp site in the trees unless your in an RV. It is a wonderful experience, and the elk themselves are just as neat to sit and watch over breakfast or lunch.
You must drive through the Avenue of Giants.
See, https://www.visitredwoods.com/listing/drive-through-a-redwood/661/
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