The most visited national park in America — and for good reason. The Great Smoky Mountains roll across the Tennessee-North Carolina border in endless waves of ancient Appalachian ridgelines, their peaks perpetually wrapped in a blue-grey mist that gives them their name. These are some of the oldest mountains on earth — older than the Rockies, older than the Alps, older than the Himalayas — and they carry the weight of that ancient history in every trail and hollow. This is a place of black bears and cascading waterfalls. Of old growth forest so dense the canopy blocks out the sky. Of synchronous fireflies that light up the summer nights in perfect unison — a phenomenon found almost nowhere else on earth. Your virtual 10K follows the Alum Cave Trail through forest draped in wildflowers, past Arch Rock and Alum Cave Bluffs, and up into the misty heights of Mount LeConte. 6.2 miles through the ancient heart of America. Run the Blue Ridge. Earn your place in the Smokies.