With seven zip lines up to 2,500 feet long across 400 acres of the beautiful Smoky Mountain area, families will be able to really enjoy the ride when visiting this region. At 450 feet above the ground, Legacy Mountain Zip Lines offer an adventure at an affordable price. Tours last about three hours and cost around $99 per person. Riders must be at least 100 pounds to ride alone. Those ages 3 and up can ride with a guide.