Sickla, Stockholm will be hosting the world’s first underground fun run in this year’s Sicklaloppet. If you love joining fun runs, better sign up for Sicklaloppet as soon as possible because the unique underground run will only be open to 400 runners.

The race will be held in mines below the industrial firm Atlas Copco’s headquarters in Sickla. The mines are usually used to test and develop Atlas Copco industrial products such as mining drills and air compressors.

Sicklaloppet spokesman Fredrik Trahn explained ‘This is going to be a world-wide exclusive running experience that will take place up to 40 metres underground.’

Nordic Atlas Copco Corporate Communications Manager Carl-Johan Olsson added ‘We want as many people as possible to see our mines and experience the history that had taken place underground here in Sickla, and that played a big role for both Atlas Copco and the Swedish industry.

‘What could be better than arranging a running race here that makes people really get into the mine’s innermost part.’

A practice run by runners wearing hard hats was held on Thursday in the 2.5 kilometre race track.

The official underground race will be held on 21 September, the same day as the above ground Sicklaloppet. The 400 slots will be on sale starting 18 June at 9am. Funds raised will be used for the firm’s charity project ‘Water For Everyone.’