Entering Canada - Canada Customs Information
Border Crossing to Alberta - Passing Through Alberta and BC to Alaska
U.S. Re-Entry Requirements for United States Citizens
Border Crossing Information
The U.S. Departments of State and Homeland Security announced that U.S. citizens travelling to Canada, Mexico, the Caribbean, and Bermuda by all means of transportation will require passports in order to return to the U.S as of June 2009.
If you are not a United States or Canadian born citizen you will be required to have a passport and possibly a Visa.