Starting at elevation zero, zen climbs to an elevation of 4,646.4 feet to reach the cragway trail. from there, he hikes up another 1,817.6 feet to the calloway peak summit, the highest point on grandfather mountain. based on these numbers, the calloway peak summit is at a height of feet. on his return trip, zen descends from the calloway peak summit to an elevation of 2,402.5 feet, arriving at the flat rock junction. so, the elevation at flat rock is feet.