The National Park Service is providing this information as a courtesy to visitors. The following is from the Department of Homeland Security.
U.S. Customs and Border Patrol is committed to working with travelers to ensure they have access to and can obtain appropriate travel documents. U.S. and Canadian citizens who lack WHTI-compliant documents are encouraged to continue with their travel plans and to obtain WHTI travel documents as soon as possible to further expedite future border crossings. more...
The Western Hemisphere Travel Initiative became effective June 1, 2009. This law affects all recreational boaters floating the Rio Grande. Boaters should be aware that float trips may be considered as trips that have left and re-entered the country. This is due to the fact that the international border is the middle of the deepest part of the river channel and as such varies from location to location. Boaters may be asked by representatives of the Department of Homeland Security to provide proper identification as required by law. The required identification types needed to be presented when landing on the US side of the Rio Grande and include the acceptable forms of identification as follows:
U.S. Passport Card:This is a new, limited-use travel document that fits in your wallet and costs less than a U.S. Passport. It is only valid for travel by land and sea.
Enhanced Driver's License (EDL):
Trusted Traveler Program Cards:
For more information, please see the following DHS website.
Last updated: February 24, 2015