2017 was my first year participating in Trek the Tower. The "race" is 40 floors (870 stairs) and you race up as fast as you can. The race directors would let runners start with 5 second intervals. I was thinking there would be mass amounts of congestion up the stairwell with over 1000 participants but there wasn't any congestion at all.
I also thought it would be terrible on my legs but honestly my only issue was my breathing. (I'm asthmatic). The air is thick and stale but if you can keep your breathing under control it's a great race.
The view from the top of the tower is impressive but you really only get a minute to enjoy it before being ushered to the elevator to go down and collect your participant shirt.
I would recommend this to anyone wanting a different kind of challenge.
This race has been my favorite for 2017.