I started C25K in June 2013, and did my first half marathon on Sunday! I can't tell you how emotional it was. The absolute best bit was running hard down towards the finish line being cheered on by friends! Then I burst into tears (again!)
I wasn't going to run as I hit a snag on a long run, regulars on here may remember my post- I frightened myself by not being able to walk straight or think straight. But what I did was to join the gym and I went to 3 classes a week and after a month I started to run to the gym (which took the emphasis off of running and allowed me to do it) so in the two months before the half I did 1 long run of 6.7 miles. So not ideal! But I screwed up my courage and did it. I ran for 10 miles before having to take some walk breaks.
It really was one of the best things I have ever done!