Go for it! Everyone needs a goal, right? 
I'd offer to join you, but it's likely I'll be running the Columbus marathon the next day. Not that I've signed up for that, or even made a mental commitment to it, yet...
Hard to tell what the terrain might be like, and they haven't posted a route yet. It'll almost surely be hilly, but the really insane hills are southeast. Starting from the southwest side of Columbus makes it likelier you'll go southwest, since there are a limited number of places to cross the river. If you want to, you can be ready.
Speed comes from what you put behind you. - Judi Ketteler