Am I Crazy?

So Ashley and I were at a wedding in Georgia and we were talking to some friends and I mentioned that I take my dog running a few times a week. After this they started saying how I should enter races so I could be motivated for something. They said how they ran a half marathon and I was thinking how crazy that was. I do more thinking about it and I decide that I would like to try it. I talk to one of my friends who is in PT school and he send me a link for a half marathon in November in Raleigh and he also sent me a training program. So I think my Dad and I are going to train and run together in the half marathon in Raleigh. Crazy?