Too bad I found out about the first edition of the Defi des Escaliers in Quebec City on the morning of June 28 after the race was over.
It is still worth mentioning for its unusual setting, staircases (escaliers in French) hence the name, Staircase Challenge-Defi des Escaliers.
Here is how it was run according to the program:
This timed challenge is "against the clock", so all participants are starting 5 seconds away from each others."
For those wanting to pace themselves, the Staircase Walk was an untimed activity.
One of the flight of stairs that participants crossed is pictured above (from Defi des Escaliers site).
The event was organized by Courir a Quebec whose next big happening is the Marathon des Deux Rives on August 30th.
Quite a workout it seems!