How many miles from 531 Donelson pike Nashville TN to Clarksville TN?

121 miles taking this route:

1. Take TN-56 NORTH from Smithville to I-40 WEST to Nashville. Follow signs.
2. Take I-40 WEST to I-24 WEST to CLARKSVILLE at EXIT 211, in NASHVILLE.
3. Take I-24 WEST to CLARKSVILLE.