Re entry to US from Canada by land

[Tahachal]

Is Naturalization Certificate enough to get re-entry to US from Cananda by land? or we have to have US Passport?.

 

[nkm-oct23]

US passport book, passport card or Enhanced Driver license is required, naturalization certificate is no longer sufficient.

 

[Huracan]

This government website has relevant information:

http://www.getyouhome.gov/html/lang_eng/index.html

or

http://www.cbp.gov/xp/cgov/travel/vacation/

However, what nkm-oct23 has told you is right, except that I think you can also get and use a NEXUS card. Basically, you should get a US passport, or US passport card, that's the easiest way.