Canadian Border Information

The Western Hemisphere Travel Initiative, or WHTI, requires U.S. and Canadian travelers to present a passport or other document that denotes identity and citizenship when entering the U.S. For additional information, including document options and requirements for special audiences, please visit GetYouHome.gov.
(http://www.getyouhome.gov/html/eng_map.html) 

U.S. citizens returning home from Canada will be required to present one of the travel documents listed here:

• U.S. Passport
• U.S. Passport Card
• Enhanced Driver’s License
• Trusted Traveler Program Cards such as NEXUS, SENTRIU or FAST  enrollment cards
• Special Audiences (Special documents for U.S. Lawful Permanent Residents, U.S. Military, Native Americans, and Boaters; birth certificates for children under the age of 16).

Canadian citizens entering the U.S. will be required to present one of the travel documents listed here:

• Canadian Passport
• Trusted Traveler Program Cards such as NEXUS or FAST enrollment cards
• Enhanced Driver’s License
• Special Audiences (Special documents for Native Americans and Boaters; birth certificates for children under the age of 16).