"Up to this point, I'd climbed about 1000 feet in elevation. The second half had me ascending another 1700 feet with 70 more switchbacks. And these are even steeper. If you ever wanted to know what a StairMaster workout from hell might feel like, just hike the Upper Yosemite Falls trail.
Or take the stairs all the way up to the top of the Empire State Building – three consecutive times."
https://seasonsofjason.com/the-redemption-hike-finishing-the-upper-yosemite-falls-trail/