The 1 south of San Francisco is still closed but the 101 all the way from So Cal is open, with delays due to construction in the Redwood area. Just traveled it from Crescent City to SF beginning of the month. Caves are great, my grandkids 9 and 12 loved them and the 2 YO enjoyed his adventure also. Adults had fun also. Bring a electric lantern and headlamps, it gets pitch black down there and the temps are in the low 40's inside the caves. Sweatshirts worked great for us. This adventure took all day and a great place for a good meal at the end of the trip is in Battle Ground, WA on the 503 and W Main St called Old Town Burger and Breakfast. Great food.
If you wish to see just the redwoods of NorCal just boogy up the 5 and cut over north of SF to the 101. We stayed the night at Burlington Campground north of Meyers Flat along the Avenue of the Giants and had a great night sleeping under the trees. 12 hours to the campground with an additional 8 hours the next day to Portland if you head back to the 5 from Crescent City.
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