You look really, really great! Glad the Couch to 5K plan is working for you.
Lookie what I found: http://www.halfmarathons.net/usa_half_marathons_north_carolina.html
My advice would be start out with this before committing to a full marathon. Not to be a ball buster or anything. But see how your body does with a half first. I've done one full marathon (in 2001). Yowzers. Maybe I'll do one again??? Maybe not. It requires A TON of training (like doing 18-20 mile runs towards the end of your training). Kind of a time suck, KWIM? Also, I could barely walk the next day after it. Had to walk down stairs BACKWARDS because my quads were so sore.
You probably need to have been running for a good year consistently before jumping into 26.2 miles. It's BRUTAL.
But halfs are awesome! Good luck!!