Hi, I'm a Canadian citizen and I would like to know if I need a passport to get into America if I am traveling by land... I know you need one if you fly but not sure about land travel... any help would be welcome

Yes, they will check your passport at the border crossing. You can usually get in with a birth certificate and driver's license, but this will all change at the end of this year, beginning of next year. Here is some info:

Canadians will need passport for U.S. border crossing