Marbled Orb Weaver (don't look if you think spiders are gross)

As I crash through the woods, there's this one kind of spider that I always run into, unless I see it in time and manage to stop half an inch before I walk face-first into the web. This is not it.

Marbled Orb Weaver, Araneus marmoreus

Marbled Orb Weaver, another one

Yet another one, quite a bit bigger than the first two

Another view, all tangled up in the leaves. These are all females

I didn't see these at all until mid-September. Now they seem to be all over the place.

The markings in the black-and-yellow zone look just like batik, to me. Their red-orange legs are so bright in the woods.