The route is located entirely in Cheatham County.

SR 249 is one of three state routes in Tennessee that begins and ends with an interchange along a freeway or interstate.

SR 249 begins in Kingston Springs at the Exit 188 interchange of I-40.

It continues northward through Pegram to Ashland City, then it turns northeast to end at I-24's exit 31 interchange in northeastern Cheatham County.

[2] The entire route is in Cheatham County.