That is a juvenile Prairie King Snake, very beneficial snake. In Texas, most are born in August and September, that one could be from a 'late' group. Very common snake, often mistaken for a Copperhead...by jittery folks.
They range in color from the brownish markings of your snake to a gray color (which then gets them killed...for a pygmy rattler) sigh........!
Seriously, I realize the average person doesn't "know their snakes', but the vast majority are harmless.
Thanks for sharing,
Flint.Edit: Going to back up on the Prairie King and go with Juvenile Rat Snake in this instance (differences are subtle) but that specimen has a little too much head for a prairie king and also the marking (V) on the head is pointed the wrong direction. Would like to see the stripe through the eye...to be certain. Good snake in any case.