Bookmarking the last page of a thread

Is it possible to bookmark the last page of a thread?

Specifically: I am running a PbP. I have all the relevant threads bookmarked in a folder, but when I go to a bookmark, I still have to hit the "Last" button to get to the end of the thread. Is there a way to edit the URL so it always goes to the end of the thread or to the latest unread post?

I think bookmarking the 'go to first new post' link is what you're looking for. It's next to the thread title.

For example:
http://www.enworld.org/forum/showthread.php?469472-IC-Uller-s-Out-of-the-Abyss&goto=newpost

If you want to construct it yourself, note that last part:
&goto=newpost