Citizens of Canada must now provide a passport to enter the United States. However, a visa is not required for Canadian citizens.
Citizens of 28 other countries can enter under a reciprocal visa waiver program. These citizens can enter the United States for up to 90 days for tourism or business with a valid passport; however, no visa is required. These countries include most of Western Europe, plus Japan, Australia, New Zealand, and Singapore. For a full list of reciprocal visa countries (and other late-breaking news for travelers to the United States), check out www.travel.state.gov .
Visitors on this program who arrive by sea or air must show round-trip tickets back out of the United States within 90 days and must be able to present proof of financial solvency (credit cards are usually sufficient). If citizens of these countries are staying longer than 90 days, they must apply for and present a visa.
Citizens of countries not covered by the reciprocal visa program are required to present both a valid passport and a visa to enter the United States. These are obtained from U.S. embassies and consulates. These travelers are also required to offer proof of financial solvency and show a round-trip ticket out of the United States within the timeline of the visa.
Once in the United States, foreign visitors can travel freely among states without restrictions.
U.S. Customs allows each person over the age of 21 to bring one liter of liquor and 200 cigarettes into the country duty free. Non-U.S. citizens can bring in $100 worth of gifts without paying duty. If you are carrying more than $10,000 in cash or travelers checks, you are required to declare it.
Travelers with disabilities will find Utah quite progressive when it comes to accessibility issues, especially in Salt Lake City  and the heavily traveled national parks in southern Utah. Most parks offer all-abilities trails, and many hotels advertise their fully accessible facilities. The National Ability Center (435/649-3991, www.discoverNAC.org ), based in Park City, provides recreational opportunities for people of all ages and abilities, including a skiing program at nearby Park City Mountain Resort .
Gay travelers will find Utah less welcoming to openly gay people than many of the surrounding Western states. There's a gay scene of sorts in Salt Lake City, but very little sign of support elsewhere in the state.
Salt Lake City's gay newspaper, Q (http://qsaltlake.com ), is a good place to get a flavor for the Utah gay scene. Many of the support groups that do exist in the state are concerned with supporting gay and lesbian Mormons.
The national and state parks, and Utah in general, are hospitable for senior travelers. The long-standing national-parks-issued Golden Age Passport has been replaced by the America the Beautiful—National Parks and Federal Recreational Lands Senior Pass. This is a lifetime pass for U.S. citizens or permanent residents age 62 or over. The pass provides access to, and use of, federal parks and recreation sites that charge an entrance fee or standard amenity. The pass admits the pass holder and passengers in a noncommercial vehicle at per-vehicle fee areas, not to exceed four adults. The pass costs $10 and can only be obtained in person at the park. There is a similar discount program at Utah state parks.