Boquillas del Carmen, Mexico Crossing
If you have a valid passport, you can use this pedestrian crossing, about 2 miles east of Rio Grande Village, to visit the village of Boquillas del Carmen. Check the park website for current hours, but generally the crossing is open May–October from 9 am to 4 pm, Friday through Monday, and the rest of the year from 9 am to 4 pm, Wednesday through Sunday. Once a mining boomtown that fed off rich minerals and silver, Boquillas has shrunk to a small village, but there are a couple of restaurants and bars along with a few shops. To get across, you can access a $5 round-trip row boat across the river and a $3 entrance fee to enter the Mexican Protected Area that the village is located in. The remaining ¾-mile to the village is easily managed on foot, but locals will also usually approach offering rides by donkey, pickup truck, or horseback, typically for around $10 round-trip.
If you do not return to the border in time, you may be stuck in Mexico for two or three days.