Can a 16-year-old girl marry a 29-year-old man if her mom doesn't consent?

There is no state that will allow a 16-year-old to get married without parental consent/court approval/special circumstances. It would probably be rather tough to convince a court to overide the authority of a parent (which they don't like to do) because it would be in the best interest of 16-year-old to marry someone who's 13 years older than herself.