sentences:  Traveling through a further sparsely populated rural area marked by dense woodlands, I-75 remains relatively flat for the next few miles before beginning another ascent up the Cumberland Mountains, once again adding a truck climbing lane.Jellico Mountain is a sub-mountain range of the Cumberland Mountains that the interstate traverses near Jellico.I-75 curves sharply to the northeast and about a mile later, it reaches the crests of Jellico Mountain where the truck lane ends.