Elevation graph from my Garmin on my hike shows an elevation gain of 57m or 19 floors seems to check out. Wind factor may skew the results. Test results using stairs in highrise building was 100% accurate.
It is 4-5 hours of work to get 25k steps in carrying 10 lb pack. My calves only need to be stretched at the end of the day. It is my feet and ankles that need more care. Chicken n WaffleZ time to get roasted