It really is pretty easy from the home page.The left side column will take you to a set of sub-menus and most of them have links to the archives.
At the bottom of the home page is another set of links to sub-menus.
I found this site when I was first getting going on fly fishing. I actually went back through all of the archives of his bulletin board and clicked on every thread of interest to me. I learned a ton before I posted my first question. There is probably no other place in the world where you can get so much really good info and advice on Fly fishing!