Anonymous wrote:I'm a green card holder who has pretty frequently crossed land borders into Canada (spouse from a border state).
No way would I ever leave the US or attempt to cross any international border without my passport. That just seems so imprudent.
My DH is a green card holder and we don't risk going to another state without green card + passport.
I've seen INS haul people off of city buses who looked Mexican and couldn't produce proper iD.
Anyway, as another PP pointed out, the issue isn't going to Canada, it's getting back into the US. They will want to see their passports and their green cards. Don't risk being detained at the border unnecessarily.