That's what our challengers will be finding out in September. Thunder Run: Steel City 24 is the very first 24 hour run of its kind to be held within a UK city. The run will take place in Graves Park, Sheffield’s biggest city park, and will see runners of all abilities coming to test their mettle and see how many 5km laps they can achieve in a day and a night.
It will be a long hard slog, with soloists, duos and teams taking part relay style.
Our challengers will be entering in teams of different sizes depending on ability. But believe us when we say, this won't be a walk (or a run) in the park for anyone - even our strongest runners. Tackling a 5km stint at 2am is no one's idea of fun! But it's one way of raising money for Weston Park Hospital Cancer Charity and that's what will keep our runners moving.