I am trying to determine exactly what documentation I will need in order to make the border crossing into Boquillas, Mexico from the United States in Big Bend National Park. There is a border crossing within the park where you are able to cross the Rio Grande and visit a small Mexican town. They have a Port of Entry for this purpose.
I am a Canadian citizen and United States Permanent Resident. I will also have a NEXUS card at the time of my visit.
On this page on the NPS website it lists what it considers to be the documentation necessary:
U.S. and Canadian citizens can present a valid: U.S. Passport; Passport Card; Enhanced Driver’s License; a Global Entry card, Trusted Traveler Program card (NEXUS, SENTRI or FAST); U.S. Military identification card when traveling on official orders; U.S. Merchant Mariner document when traveling in conjunction with official maritime business; or Form I-872 American Indian Card, or (when available) Enhanced Tribal Card.
Is this accurate information? If so, I would like to travel with only my NEXUS card and Green Card and not bring my passport. However, I can't find any information about Mexico accepting it as valid documentation.
Thanks in advance.