It would depend on the speed. Texas is 790 miles long and 660 miles wide at its most distant points.
The I-10 travels across Texas in generally a east-west direction. To the east, the I-10 travels into the state of Louisiana. To the west, the I-10 travels into the state of New Mexico.
The total distance of the I-10 across the state of Texas is approx. 879 miles long, which requires an approx. driving time of 14 hours and 39 minutes to complete when driving an average speed of 60 miles per hour.
Texas Facts & Figures (courtesy of NetState.com):
Total Area: Texas covers 268,601 square miles, making it the 2nd largest of the 50 states, right behind Alaska.
Land Area: 261,914 square miles of Texas are land areas.
Water Area: 6,687 square miles of Texas are covered by water making Texas the 9th wettest state.
Highest Point: The highest point in Texas is Guadalupe Peak at 8,749 feet above sea level.
Lowest Point: The lowest point in Texas is sea level where Texas meets the Gulf of Mexico.
Mean Elevation: The Mean Elevation of the state of Texas is only 1,700 feet above sea level.
Major Rivers: The Rio Grande, which marks the border between Texas and Mexico, The Red River, The Brazos River
Planning to visit Texas? Find out some tips on how you can make the most of your visit; places to stay, things to do, places to eat and more at Traveltexas.com.
Driving through Texas can be a bit different than driving through other states for a variety of reasons: it’s a huge place, of course, and it can be rather hot and fairly desolate, depending on your route. So before you hit road, it’s worth your while to hit the books, so to speak, and absorb some of these tips for Texas driving shared by Texasmotorcars.com.