I have been wanting to participate in a Duathlon for a long time now. I have my new bike and I am ready to get started. I found a Duathlon October 13, 2007. it is the Dodge the Leaves Duathoon in Vicksurg MI. Has anyone ever heard of it?

So, I guess my questions are, what do I need to know? Can I even possibly be ready by then? I currently ride my bike 50-60 miles per week, and I only run 10 miles per week. I just completed my first 5k Saturday and finished in 31:06. I have a 10k I am training for now that is on Oct 7.
So, is this possible, or am I in over my head?