http://www.newsweek.com/fortnite-time-trial-locations-week-3-challenge-guide-1165050

Fortnite ’s Week 3 Challenges are live, and we’re here to help you figure out the toughest one. Let’s complete three Timed Trials.

Just approach a clock that looks like this and the Timed Trial will begin. Epic Games/GuidingLight @ YouTube