Well, I could wait to possibly, maybe find an organized marathon or half-marathon OR I could be a D-I-Yer in the Phedippidations Worldwide Half Marathon. Being the impatient type and wanting a plan, I have just registered for the PWWHM. And I'm the first entrant in Africa! (42nd overall so far). Come on and join us! You can either run an organized event or do your own thing. The dates are 13-14 October, so you have plenty of time to train. There is a forum where you can chat with others and get support and advice; there are training plans available, and if you or perhaps your significant other are new to running, there is also a 5K option. I'm stoked.
Go to: http://www.worldwidehalf.com