The Cumberland Gap is a pass across the CumberlandMountains region of the Appalachian Mountains.
As the main east-west gap in the mountains, it was an important part of the Wilderness Road, an old Indian path which Daniel Boone widened with 35 axmen, thus opening up the western frontiers of Kentucky and Tennessee for pioneer settlement.
The 12-mile long Cumberland Gap consists of four geologic features: (1) the Yellow Creek valley, (2) the natural gap in the CumberlandMountain ridge, (3) the eroded gap in the Pine Mountain and (4) the 3-mile diameter impact crater in which Middlesboro, Kentucky is located.