Can you cross the Canadian/American border under 18?

Can you cross the Canadian/American border under 18? Ive heard you can do it if you are 16 and up but I’m not sure. Any extra information would

Can you cross the Canadian/American border under 18? I've heard you can do it if you are 16 and up but I’m not sure. Any extra information would be helpful. Thank you. (With a passport of course)

or:Can you cross the Canadian/American border under 18? I've heard you can do it if you are 16 and up but I\u2019m not sure. Any extra information would be helpful. Thank you. (With a passport of course)

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