It looks more like a bobcat to me as well but I can certainly see why you are wondering.The head looks like it could be a mountain lion.It's too bad you don't have scale in the picture,so you could judge the size better.Also the tail would tell you everything you would need to know.
I saw a mountain lion 3 years ago in NY while bow hunting for deer.It was at dusk but it was close enough that I could clearly identify it.