Maybe not.

Visitors from any country other than the U.S. have always needed a passport to enter Canada. On the other hand, because of a friendly border crossing agreement between Canada and the United States, Canada Border Services did not require U.S. citizens to present a passport to enter Canada. This friendly border crossing agreement used to be mutual; however, now the WHTI requires that U.S. citizens have a passport to return home. In this way, passport requirements for Canada and U.S. borders are different on paper, but, are in practice, the same. Canada will not allow a U.S. citizen into the country who does not have the proper documentation to return home.

http://gocanada.about.com/od/canadatraveloverview/qt/uscitizenborder.htm

 

所有跟帖： 

• 上面一大段英文是针对美国公民的。美国公民没有绿卡啊，当然要护照啊。楼主问的是 -miamiman- ♂ (135 bytes) () 07/31/2012 postreply 20:35:26

• 你说的情况基本属实。即持美绿卡由陆路往返美加边境无需提供护照。但说“一点问题没有”就 ---1234567-- ♂ (83 bytes) () 07/31/2012 postreply 22:30:29