
Does Canadians need a passport in traveling to Los Angeles
Yes or you could also present a NEXUS card or a FAST card. Any mode of travel; be it by air, land or water you must present at least one of those cards to be able to go to Los Angeles without any problems. This is in part with the Western Hemisphere Travel Initiative (WHTI) in strengthening the border security and to facilitate legitimate visitors to the US.
This link contains the detailed information about the needed requirements for traveling from Canada to Los Angeles:
http://ottawa.usembassy.gov/content/content.asp?section=can_usa&document=borderissues_whtiJune09

