On the menu bar on the main site (and every sub-page):
Race Info -> Message Board
I had a limit of about 6-7 things that I could put on the top level navigation before it became a bit unusable on a mobile device or just too visually cluttered on a regular web browser, so I put the critical ones on the top and bumped others to the sub-menu's.
As new content is added and I see the way folks interact with the site I'll move things around.