Thru-hikers like to invent games and “challenges”. For example, there’s the Four State Challenge, which involves hiking from Virginia, through West Virginia and Maryland, before reaching Pennsylvania. To complete this you hike 44 miles in under 24 hours.
A slightly shortened version of that is the Maryland Challenge, which covers 41 miles from state line to state line.
Is that too tame for you? Then try the Rocky’s Pizza Challenge, which starts from Curley Maple Gap Shelter in Tennessee. Within two hours you must race down the mountain to the town of Erwin, order two large pizzas at a local pizza shop, run next door to the liquor store and buy a case of beer, then haul the pizza and beer the five miles back up to the shelter.