The greatest vertical height climbing stairs in 12 hours is 13,145.65 m (43,128 ft 8 in) and was achieved by Christian Riedl (Germany) climbing Tower 185 in Frankfurt, Germany, on 28 September 2014.
Riedl made 71 ascents with each ascent comprising of 988 steps. In total, Riedl climbed 70,148 stairs during the record breaking feat. At the time of the attempt, Riedl ranked No. 3 in the Towerrunning World Cup rankings.