It was about the size of an eisenhower dollar. I moved a stick around the edge to try to get the spider to come out but it didn't. It might have been recently abandoned or the spider knew what's up.
Found in the chaparral/coastal sage scrub areas at Little Harbor campground (on the Whale's Tail). They're supposedly all over the island, and I think I've seen 3 so far.
I was out camping on Catalina when I found it, (and another abandoned one). They were both on a hillside and I found this one on accident really. I was climbing up and it was right in front of my face. And the other was partly destroyed and hanging out so that was easy to see!