Do You Need a Passport to go to Mexico?
You need a passport to walk and to fly into Mexico. I have driven into Mexico and they didn't require a passport, I'm not sure if they have changed this yet.

How to WALK into the US from Mexico:
   • How to Walk into the United States fr...  

How to WALK into Mexico from the US:
   • How to Walk into Mexico from the Unit...  

Whenever you do any Mexico Travel, its best to bring a passport with you.

Do I need a passport to go to Mexico?
Do you need a passport for Mexico?

San Diego Mexico border
Tijuana border crossing


I am not a lawyer. This is only advise, please do your own research.