If you are walking across the Mexico border do need a passport?

However, there are a few exceptions to this rule:

- If you stay in Mexico for more than 7 days, you will need to obtain a Tourist Card (Tarjeta de Turista), which costs $45 USD.

- If you are traveling by land, you must have a valid passport with proof of citizenship and a visa if necessary.

- If you are entering Mexico from a country other than the United States, you may need a visa.

It's always a good idea to check with the Mexican embassy or consulate in your country before traveling to make sure you have all the necessary documents.

Here are some additional tips for crossing the Mexico border:

- Be prepared to show your passport and other travel documents at the border crossing.

- Declare all items you are bringing into Mexico, including food, alcohol, and tobacco.

- Be respectful of Mexican customs and laws.

- Exchange your money for pesos at a bank or currency exchange before crossing the border.

- If you are driving into Mexico, be sure to have a valid driver's license and registration.

- Do not cross the border with illegal drugs or weapons.