On August 18, Stockholm’s buzzing Sodermalm neighborhood will play host to one of the world’s most radical races: Midnattsloppet, or the Midnight Race.

Some 20,000 runners join the yearly 10km staggered event. The race, staged on asphalt, has run since 1982, growing more popular every year.

Pitched as an intergenerational fusion of sport and culture, the Midnight Race gets described as a party, carnival, even a circus. Besides entrants in luminous t-shirts, expect to see samba-dancers dressed in masquerade outfits. Forget numbered race-bibs.

Last year’s winner of the 30th Midnattsloppet, Haben Idris of Sweden, completed the shady 10kms in 31:08. On the women’s side, Jeri Emuru again of Sweden finished in 33:55.