In 1990, the route was extended east to US 69 in Emory, with SH 276 absorbing the easternmost part of FM 35 in the process.

[4] On February 27, 2023, the new route of 276 was officially opened, while the existing 276 that ran from FM 36 to Downtown Quinlan was shut down to be reconstructed into Bus.

The business route was designated on April 29, 2023 when SH 276 was rerouted south of Quinlan.

The highway travels east along Main Street and intersects Spur 264 (an old routing of SH 34) a few blocks west of the town square.

Leaving the town square, the highway continues to travel eastward along Main Street before ending at an intersection with SH 34.