sentences:  Its topographic prominence is drastically reduced, however, due to the mountain's close proximity to two higher neighbors, Clingmans Dome and Mount Le Conte.Like much of the Smokies crest, Mount Kephart lies on the Tennessee-North Carolina border, in Sevier County, Tennessee and Swain County, North Carolina.The mountain rises nearly above its northern base at Porters Flat, and approximately above its southern base along the Oconaluftee headwaters.