Marathon to Shreveport: A Texas-Louisiana Road Trip Guide

Marathon, Texas, population 430, sits at the gateway to Big Bend National Park. Shreveport, Louisiana, 650 miles east, awaits on the Red River. This route spans vast deserts, Hill Country, bayous, and pine forests. US-90 and I-10 connect them, passing through San Antonio and Houston. The drive takes about 10 hours without stops.

The route crosses the Pecos River, the Edwards Plateau, and the Mississippi River Delta plain. In Marathon, the elevation is 4,035 feet; in Shreveport, it's 200 feet. The change in landscape is dramatic. You'll see prickly pear cacti give way to live oaks and cypress swamps.

Historical fact: The section of US-90 between Marathon and Del Rio follows part of the historic Old Spanish Trail, established in 1929. This highway linked St. Augustine, Florida, to San Diego, California. Today, it offers a quiet alternative to the interstate.

Safety: west Texas has low traffic, but high speeds (75 mph) and wildlife. I-10 in Houston is congested. In Louisiana, I-20 can be slick in rain. Ensure tire pressure and coolant levels. Cell service drops west of Del Rio (no signal for 40 miles).

Family stops: San Antonio has SeaWorld and Six Flags Fiesta Texas. Houston has Children's Museum and Zoo. In Shreveport, Sci-Port Discovery Center and the Louisiana Boardwalk. Kid-friendly restaurants include The Gristmill in San Antonio.

Pet-friendly: Most chain hotels along route accept pets. Rest stops: Texas has many with pet areas. In Louisiana, the rest area near Greenwood has a dog park. Carry water for pets; temperatures exceed 100°F in summer.

Fatigue management: drive no more than 3 hours between breaks. Recommended rest stops: Langtry (Judge Roy Bean Museum), Ozona (rest area with views), and Beaumont (Gator Country). Alternatively, take a nap at a rest area. Use the method described in how to find the best stops and hidden gems between cities to find quiet spots.

West Texas: Chihuahuan Desert, flat with distant mountains. Marathon sits near Big Bend National Park, famous for the Santa Elena Canyon. East of Del Rio, the landscape becomes rolling hills. The Hill Country near Kerrville has limestone bluffs and spring-fed rivers.

Central Texas: Austin and San Antonio are cultural hubs. San Antonio's River Walk and Alamo are UNESCO World Heritage sites (Mission San Antonio de Valero). The missions complex was inscribed in 2015. Houston offers Space Center Houston and museum district.

Louisiana: Pine forests and swamps near Shreveport. Caddo Lake, 30 miles north, is a large cypress swamp with kayaking. In Shreveport, the Strand Theatre and Louisiana State Exhibit Museum showcase local culture. Commerce includes oil, gas, and casinos.

• Big Bend National Park (Marathon area)
• Amistad National Recreation Area (Del Rio)
• Hill Country wineries near Fredericksburg
• San Antonio Missions (UNESCO)
• Houston's Museum of Fine Arts
• Caddo Lake State Park (near Shreveport)

Fuel stations are sparse west of San Antonio. Fill up in Marathon (last gas for 60 miles). After Del Rio, US-90 has regular stations. I-10 from San Antonio to Houston has many exits. In Louisiana, exits are frequent along I-20 east of Shreveport.

Road quality varies: US-90 is two-lane with some rough patches; I-10 is well-maintained. Construction zones near San Antonio and Houston cause delays. Tolls: none on US-90; I-10 near Houston has toll lanes (optional).

• Marathon: Gage Hotel has premium fuel.
• Sanderson: Chevron station, 24/7.
• Del Rio: multiple stations off US-90.
• San Antonio: many options along I-10.
• Houston: avoid downtown during rush hour.
• Shreveport: exits off I-20 have gas.

Driving lights: west Texas requires high beams at night. Watch for deer between Marathon and Del Rio. Louisiana has speed cameras in some parishes. For tips on planning stops, see how to find the best stops and hidden gems between cities.