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The state of Texas (TX) in the USA is “in the south-central part of the USA”, "mostly in the northern hemisphere (but parts of it extend into the southern hemisphere)", "near the western end of the southern pine belt", "on interstate 35", and "on flat plains or rolling plains (there are mountains to the west)". The 1,254-mile Texas border, which runs from the Gulf of Mexico to El Paso, makes up roughly half of the border between the USA and Mexico.