Those aren't redwoods. Redwood bark is red and very soft, with sinewy/threadlike texture on the outside - not this chunky brown scaly looking bark. Also they are more tapered with a wider base, and typically don't have the moss hanging from low branches (or have low branches) like this photo.

There are a number of forests that look like this photo in northern California, and they're beautiful, but those aren't redwoods.

Source: grew up with redwoods on my property, googled to double check I wasn't misremembering.