The Harlech hill climb event takes place on the Ffordd Pen Llech street in Harlech, Gwynedd, Wales, August 11, 2019. /VCG Photo

The climb has been named by Guinness World Records as the steepest street in the world. Riders tackle a 330-meter climb, which averages 17 percent and reaches a maximum gradient of 37.4 percent. /VCG Photo

Spectators line beside the climb and cheer on cyclists. /VCG Photo

Ffordd Pen Llech street was officially named the steepest in the world this July, which is two percent steeper than the previous record holder in New Zealand. /VCG Photo