Essential Information for U.S. Visitors to Waterton Park
U.S. citizens 16 years of age or over who re-enter the United States by land and sea are required to have a passport or other appropriate secure document like a NEXUS card.
Children age 18 and under will be able to enter with proof of citizenship. Verbal claims of citizenship and identity alone will not be sufficient to establish identity and citizenship for entry into the United States.