The Wayro route from Smithville to Saltillo is 441 miles (710 km), about 7 h 39 min of driving without stops. The U.S.–Mexico border is at about mile 257 on this route, near the Laredo port of entry.
What the State Department tells travelers on this route:
- Nuevo León: “Those traveling between the U.S. border and Monterrey on highways 85/85D, 54, and 40/40D should exercise caution and avoid travel after dark.”
- Nuevo León: “Armed robberies and carjackings have occurred along these highways even during daylight hours.”
| Distance | 441 mi (710 km) |
|---|---|
| Driving time, no stops | 7 h 39 min |
| Main roads, in order | TX 304 → I-10 → I-35 → MEX-85 → MEX-85D → NL 100D → MEX-40D → MEX-40 |
| Border crossing | about mile 257 of this route, Texas → Tamaulipas (near the Laredo, TX port of entry) |
| Mexican states on the route | Tamaulipas (Level 4), Nuevo León (Level 2), Coahuila (Level 3) |
| Toll roads | MEX-85D, MEX-40D |
| Fuel estimate (car at 25 mpg) | about 17.7 gal; actual use varies by vehicle and traffic |
| Stops listed below | 9 |
Crossing into Mexico: what you need for Saltillo
| Passport | Passport book or passport card to enter Mexico by land |
|---|---|
| FMM entry permit | Required for this trip: Saltillo is well beyond the 12-mile (20 km) border zone where the permit is not needed |
| Temporary vehicle import permit (TIP) | Required for a U.S.-registered vehicle this far into Mexico |
| Mexican auto insurance | Required for all vehicles: buy a Mexican policy before you cross |
Sources: U.S. State Department, Mexico travel information (updated August 11, 2026); permits are issued by Banjercito.
Crossing at Laredo
Laredo reaches Nuevo Laredo over several city-run bridges. Gateway to the Americas (Bridge I) handles pedestrians and cars and has SENTRI lanes, Juárez-Lincoln (Bridge II) takes cars and buses, and the World Trade Bridge is for commercial trucks.
What the drive from Smithville to Saltillo is like
I-35 (153 mi) and MEX-85 (117 mi) carry about 61% of the 441 miles. The U.S. part of the drive runs through Texas for about 257 miles; after the border at Laredo you have about 184 miles left in Mexico. The Mexican leg uses MEX-85D, MEX-40D, toll highways (cuota). Of the 9 stops listed below, 2 are within a mile of the road.
The route from Smithville to Saltillo, road by road
| Road | Route miles (from–to) | Length, mi | State |
|---|---|---|---|
| local roads | 0–12 | 12 | Texas |
| TX 304 | 12–33 | 21 | Texas |
| I-10 | 33–103 | 70 | Texas |
| I-35 | 103–256 | 153 | Texas |
| local roads | 256–260 | 4 | Texas, Tamaulipas |
| MEX-85 | 260–377 | 117 | Tamaulipas, Nuevo León |
| MEX-85D | 377–382 | 5 | Nuevo León |
| NL 100D | 382–405 | 23 | Nuevo León |
| connecting roads | 405–406 | 1 | Nuevo León |
| MEX-40D | 406–423 | 17 | Nuevo León, Coahuila |
| MEX-40 | 423–438 | 15 | Coahuila |
| local roads | 438–441 | 3 | Coahuila |
- Mile 257 of this route: Texas → Tamaulipas (international border)
- Mile 283 of this route: Tamaulipas → Nuevo León (state line)
- Mile 418 of this route: Nuevo León → Coahuila (state line)
Stops between Smithville and Saltillo
- Right off the route (under 1 mile): Mission Concepcion (mile 101), Cathedral of San Agustin (mile 256)
- Nature and outdoors: Palmetto State Park (mile 43), Walnut Springs Park (mile 68), Saffold Dam (mile 69), Lake Casa Blanca International State Park (mile 254)
- Museums and history: Mission Concepcion (mile 101), Mission San José (mile 101), Mission San Juan Capistrano (mile 105), Mission San Francisco de la Espada (mile 106), Cathedral of San Agustin (mile 256)
Palmetto State Park
Dwarf palmettos, the park's namesake, grow beneath the trees along a trail at this Gonzales County park. Visitors canoe, swim and fish on the San Marcos River and an oxbow lake, and CCC-built structures still stand.
Walnut Springs Park
Designed by architect Robert H. H. Hugman and begun by Civilian Conservation Corps workers in 1933, this Seguin park follows Walnut Branch, a Guadalupe River tributary, with stone walls, walkways, and bridges; the renovated park was dedicated in 2011.
Saffold Dam
Along the Guadalupe River in Seguin, this dam sits within Max Starcke Park, a 227-acre city park with picnic pavilions, a walking trail, riverbank fishing, and a paddling trail on Lake Seguin.
Mission Concepcion
Dedicated in 1755, the stone church here is one of the country's oldest remaining original stone churches and the least restored of San Antonio's colonial missions. Inside, four rooms still show colorful frescoes painted more than 250 years ago.
Mission San José
Known as the Queen of the Missions, this 1720 Franciscan mission has a stone church completed in 1782, a working grist mill and the park visitor center. It's still an active Catholic parish within a UNESCO World Heritage Site.
Mission San Juan Capistrano
Founded in 1716 in East Texas as Mission San José de los Nazonis, it was moved to the east bank of the San Antonio River in 1731 and renamed San Juan Capistrano. It's part of a UNESCO World Heritage Site.
Mission San Francisco de la Espada
Part of the San Antonio Missions UNESCO World Heritage Site and still an active parish, Espada shows off a three-bell stone chapel front and a double-arched 1745 aqueduct that carries its acequia over Piedras Creek.
Lake Casa Blanca International State Park
Set on a 1,680-acre reservoir in Laredo, minutes from the Mexican border, the park draws anglers after bass, crappie and catfish, along with swimmers, boaters and water-skiers. Trails, picnic areas and shoreline campsites fill the land side.
Cathedral of San Agustin
Facing San Agustín Plaza in downtown Laredo, the church was built between 1866 and 1872 and became the cathedral of the new Diocese of Laredo in 2000. Its clock tower was raised after 1919.
When you get to Saltillo
Founded in 1577 as the Villa de Santiago del Saltillo, Coahuila's capital sits high on a plain backed by the Sierra de Zapalinamé. The city gave its name to the Saltillo sarape, and its cathedral, museums and nearby wineries such as Viñedos Zapa and Bodegas Capellanía make it an easy overnight stop on the way south.
- Catedral de Santiago: Begun in 1745, the cathedral blends Baroque and Churrigueresque styles and keeps about 45 colonial-era oil paintings inside. source
- Museo del Desierto: Opened in 1999, the museum explains Mexico's deserts with a T. rex, a hadrosaur and a Quetzalcoatlus, plus a live prairie dog colony. source
- Museo de las Aves de México: Its mounted birds represent about 75 percent of Mexico's bird species, displayed in a 19th-century building that was once a Jesuit school. source
Desert Museum
Opened in 1999, Saltillo's Museo del Desierto explores the deserts of Mexico across four pavilions, with skeletons of Tyrannosaurus rex and Quetzalcoatlus, a live prairie dog colony, a plant nursery, and a courtyard where simulated rain falls.
Saltillo Cathedral
Built between 1745 and 1800 in downtown Saltillo, the Cathedral of Santiago Apóstol has a carved stone facade with Solomonic, estípite, and Churrigueresque columns. Inside, look for an ornate altarpiece with a silver frontal and a pulpit carved with plant motifs.
More drives to Saltillo
- Brenham, TX to Saltillo
- Austin, TX to Saltillo
- Marble Falls, TX to Saltillo
- Brownsville, TX to Saltillo
- Galveston, TX to Saltillo
- Wimberley, TX to Saltillo
From Smithville to other places in Mexico
- Smithville, TX to Parras de la Fuente
- Smithville, TX to Ojinaga
- Smithville, TX to Nuevo Laredo
- Smithville, TX to Monclova
- Smithville, TX to Linares
- Smithville, TX to Ciudad Acuña
All routes to Saltillo, border crossings and permits in one place: Driving to Saltillo, Mexico from the U.S.
Frequently asked questions
How long is the drive from Smithville to Saltillo?
About 7 h 39 min of driving without stops, over 441 miles.
How far is Saltillo from Smithville by car?
About 441 miles (710 km) on the Wayro route. Other map services may show a few miles more or less, depending on where they start and end in each city.
Where does the Smithville to Saltillo drive cross into Mexico?
At about mile 257 of this route, from Texas into Tamaulipas, near the Laredo port of entry.
Do I need a permit to drive my car from Smithville to Saltillo?
Yes. A temporary vehicle import permit (TIP) is required for a U.S.-registered car this far into Mexico. You also need Mexican auto insurance and a passport book or card. An FMM entry permit is required too.
Is it safe to drive from Smithville to Saltillo?
The U.S. State Department rates Tamaulipas Level 4: Do Not Travel; Nuevo León Level 2: Exercise Increased Caution; Coahuila Level 3: Reconsider Travel (advisory issued May 29, 2026). Read the full advisory before you go.
What roads does the drive from Smithville to Saltillo use?
In order: TX 304, I-10, I-35, MEX-85, MEX-85D, NL 100D, MEX-40D and MEX-40. The road-by-road table above shows the route miles and states for each one.
What are good stops between Smithville and Saltillo?
Closest to the road: Walnut Springs Park (park, mile 68, 2 mi from the route); Mission Concepcion (spanish mission, mile 101, 0.4 mi from the route); Cathedral of San Agustin (catholic cathedral, mile 256, 0.1 mi from the route). All stops are described above.
How we put this guide together
Wayro calculates the route from OpenStreetMap road data; mile numbers are positions along this route, not highway mile markers, and "from the route" distances are straight-line, so the real detour depends on access roads. Stops are chosen from parks, natural sites, museums, historic sites and attractions close to the route (roughly 2 to 7 miles depending on the type, farther for World Heritage sites): at least one strong stop for each stretch of the drive, then the best-known places nearest the road, with no more than five of one type, up to nine in all. Places that are closed, private or not open to visitors are removed. Place and city descriptions are written by the Wayro team from official park, museum, tourism and government websites and other published sources. Safety levels and entry rules were checked against the U.S. Department of State on September 29, 2026. Conditions change, so check the linked sources before you travel.
Route data © OpenStreetMap contributors.