23 hour drive

We have crossed at Laredo and also at Brownsville. Both are just fine. We have used Laredo many times...that way you go through Saltillo, Matahuala, San Luis Potosi, Queretero, Morelia and here. You can also easily visit San Miguel de Allende, Guanajuato, Leon, Dolores Hidalgo and Leon, as well as Patzcuaro. It can be done in 2 full days of driving, staying overnight in San Luis Potosi or Queretero, and arriving in Zihua the following day, but there is so much to see at all the places I mentioned, and more that the ones I mentioned, it is a shame not to see at least some of it. You could easily take 2-3 weeks to do this route