DW Runners

So, I am (quite successfully) doing the Couch-to-5k program at the moment. I just completed week 6 today, which means I can now very slowly run 25 minutes without stopping. There are only three more weeks of the program left and they are all 3 days of the same length. Next week's will be 25 minutes, the week after 28 minutes, after that 30 minutes.

I am an extremely slow runner/jogger right now. I did the 25 minutes on a hilly section, but my 20 minute run in rather plan terrain the week before, which wasn't any faster than today's, was only 2 kilometers long. However, on June 16th, I want to run a 5K. I am moving in July and want to do a 5K before that - but the only one that is going on n my hometown in June is a rather fast one. last year, the slowest 5K runner did the run in 43 minutes. This seems like madness to me right now. I don't want to be particularly fast, of course, but jogging the whole course and not finishing ten minutes after the second-to-last person would be nice :)

And this is where I am asking the wisdom of you people :) The path I am running now is really beautiful and I hate having to turn around and go back. The full path would be 4.5 kilometers, though. Do you think I can already do one of my runs as a 'long run' and jog/walk that distance? Would that make sense?