The Rio Grande, known in Mexico as the Río Bravo del Norte or simply the Río Bravo, is one of the principal rivers in the southwestern United States and in northern Mexico. The length of the Rio Grande is 1,896 miles (3,051 km). It originates in south-central Colorado, in the United States, and flows to the Gulf of Mexico. The Rio Grande drainage basin (watershed) has an area of 182,200 square miles (472,000 km2); however, the endorheic basins that are adjacent to and within the greater drainage basin of the Rio Grande increase the total drainage-basin area to 336,000 square miles (870,000 km2).
Presidio County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 6,131. Its county seat is Marfa. The county was created in 1850 and later organized in 1875. Presidio County is in the Trans-Pecos region of West Texas and is named for the border settlement of Presidio del Norte. It is on the Rio Grande, which forms the Mexican border.
Presidio is a city in Presidio County, Texas, United States. It is situated on the Rio Grande River, on the opposite side of the U.S.–Mexico border from Ojinaga, Chihuahua. The name originates from Spanish and means "fortress". The population was 4,169 at the 2000 census, and had increased to 4,426 as of the 2010 US census.
The Rio Grande has changed course several times in recorded history, leading to a number of border disputes and uncertainties, both international and between individual U.S. states:
The Boundary Treaty of 1970 is a treaty between the United States and Mexico that settled all outstanding boundary disputes and uncertainties related to the Rio Grande border between them.
The Kansas City, Mexico and Orient Railway, started in 1900 by American railroad entrepreneur Arthur Edward Stilwell, was the predecessor of the Chihuahua al Pacífico railroad in Mexico. It was intended to reach the Pacific Ocean at Topolobampo, Sinaloa.
Texas Pacifico Transportation Ltd. is a Class III railroad operating company in West Texas owned by Grupo México. The company operates over the South Orient Rail Line under a lease and operating agreement with the Texas Department of Transportation and Texas Pacifico Transportation, Ltd. The Texas Pacifico company began service in March 2001.
The Brownsville & Matamoros International Bridge, also known as B&M International Bridge, Brownsville-Matamoros International Bridge and Express Bridge, is one of three international bridges that cross the U.S.-Mexico border between the cities of Brownsville, Texas, and Matamoros, Tamaulipas. This international bridge unites the Matamoros–Brownsville Metropolitan Area, which counts with a population of 1,136,995, making it the 4th largest metropolitan area in the Mexico-US border.
The McAllen–Hidalgo–Reynosa International Bridge is a road bridge completed in 1926, crossing the Rio Grande between the state of Tamaulipas in northeastern Mexico and the state of Texas in the southwestern United States.
Federal Highway 2 is a free part of the Mexican federal highway corridors that runs along the U.S. border. The highway is in two separate improved segments, starting in the west at Tijuana, Baja California, on the Pacific coast and ending in the east in Matamoros, Tamaulipas, on the Gulf of Mexico. Fed. 2 passes through the border states of Baja California, Sonora, Chihuahua, Coahuila, Nuevo Leon and Tamaulipas. It has a total length of 1,963 kilometres (1,220 mi); 1,319 kilometres (820 mi) in the west and 644 kilometres (400 mi) in the east.
La Entrada al Pacífico is a trade corridor designated as "Trade Corridor 56" by the Intermodal Surface Transportation Efficiency Act. The corridor is an international project between Mexico and the United States as a route from the Pacific Ocean port of Topolobampo in the Mexican state of Sinaloa to the U.S. state of Texas and beyond by way of the Midland-Odessa area. There is also a proposed upgrade of the rail connection, which might be easier by not requiring the addition of new bridges and tunnels in the Barranca de Cobre region. Its canyons are comparable in depth to the Grand Canyon in the United States.
The World Trade International Bridge is one of 4 international bridges located in the cities of Laredo, Texas, and Nuevo Laredo, Tamaulipas, that connect the United States and Mexico over the Rio Grande. It is owned and operated by City of Laredo and the Secretaría de Comunicaciones y Transportes. It is also known as Laredo International Bridge 4.
Ojinaga is a town and seat of the municipality of Ojinaga, in the northern Mexican state of Chihuahua. As of 2015, the town had a total population of 28,040. It is a rural border town on the U.S.-Mexico border, with the city of Presidio, Texas, directly opposite, on the U.S. side of the border. Ojinaga is situated where the Río Conchos drains into the Río Grande, an area called La Junta de los Rios. Presidio and Ojinaga are connected by the Presidio-Ojinaga International Bridge and the Presidio–Ojinaga International Rail Bridge.
The Eagle Pass–Piedras Negras International Bridge is an international bridge which crosses the Rio Grande connecting the United States-Mexico border cities of Eagle Pass, Texas and Piedras Negras, Coahuila. The bridge is also known as "Eagle Pass Bridge 1" and "Puente Piedras Negras-Eagle Pass". The road continues into Eagle Pass as U.S. Route 57, and Piedras Negras as Mexican Federal Highway 57.
La Linda International Bridge (also known as the Gerstaker Bridge, Hallie Stillwell Memorial Bridge, Big Bend Crossing Bridge, Puente La Linda, and Heath Crossing is an international bridge which crosses the Rio Grande on the United States–Mexico border in the Big Bend region of Texas. The southern terminus of Ranch to Market Road 2627 in Heath Canyon, it connects Brewster County with the village of La Linda in Acuña Municipality, Coahuila.
The Bridge of the Americas (BOTA) is a group of international bridges which cross the Rio Grande and Texas State Highway Loop 375, connecting the Mexico–United States border cities of Ciudad Juárez, Chihuahua and El Paso, Texas, via the MX 45 from the south and the I-110 from the north, crossing the El Paso BOTA Port of Entry. The bridge is known colloquially as "Puente Libre" in Ciudad Juárez, officially as "Puente Internacional Córdova-Las Américas" or "Puente Internacional Córdova de las Américas", and also as "Puente Río Bravo", "Cordova Bridge", and "Free Bridge".
The Ysleta–Zaragoza International Bridge is an international crossing over the Rio Grande, connecting the United States-Mexico border cities of El Paso, Texas, and Ciudad Juárez, Chihuahua. The bridge is also known as "Zaragoza Bridge", "Puente Zaragoza" and "Puente Ysleta-Zaragoza".
The Presidio–Ojinaga International Rail Bridge is an international bridge that crosses the Rio Grande between the cities of Presidio, Texas, and Ojinaga, Chihuahua, on the United States-Mexico border.
The Presidio Texas Port of Entry is an international border crossing between Presidio, Texas in the United States and Ojinaga, Chihuahua in Mexico. It is located at the Presidio–Ojinaga International Bridge, connecting U.S. Route 67 to the north with Mexican Federal Highway 16 to the south. The original, privately-owned wooden bridge was built in the early 1900s, and the port of entry was established by executive order in 1917. The bridge was most recently replaced in 1985. The current border inspection station was completed about two years later.
The International Railway Bridge crosses the Niagara River between Fort Erie, Ontario, Canada and Buffalo, New York, United States
US 67 
Fed. 16 
