Wikipedia
Everesting
Everesting is an activity in which cyclists ascend and descend a given hill multiple times, in order to have cumulatively climbed 8848 meters (the elevation of Mt. Everest).
The first event described as "Everesting" was by George Mallory, grandson of mountain climber George Mallory. The younger Mallory ascended Mount Donna Buang in 1994 , having ridden eight "laps" of the 1069 meter hill. The format and rules were cemented by Andy van Bergen, inspired by the story of Mallory's effort. In the first official group effort, van Bergen organized 65 riders, 40 of whom finished the Everesting attempt.