In what mountains is the Barkley Marathon held?  
Barkley Marathons: The Barkley Marathons is an ultramarathon trail race held in Frozen Head State Park near Wartburg, Tennessee. Frozen Head State Park: Frozen Head State Park and Natural Area is a state park in Morgan County, Tennessee, in the southeastern United States. Frozen Head State Park:  The park, situated in the Crab Orchard Mountains between the city of Wartburg and the community of Petros, contains some of the highest mountains in Tennessee west of the Blue Ridge.
Crab Orchard Mountains