Originally Posted by John N

Here is the route I would suggest. https://ridewithgps.com/routes/41532438 to get across the crossing. Once in Gustavo Diaz Ordaz you can go your own way since this route goes further as it is a route I plan to take next year between Brownsville and El Paso. The only stretch that is not too fun is the ~2 miles on US-83 west of La Joya but that could be avoided by riding unpaved Old Military Rd. I have walked across the border and it was definitely an easy one. As others had mentioned, just be sure to get your visitor card on the Mexico side.