KristallMarathon

The Merkers Kristallmarathon offers a one-of-a-kind running adventure entirely underground in the Erlebnisbergwerk Merkers near Eisenach, Germany. Athletes compete 500 meters below the surface in constant 21°C conditions, making it a truly unique winter marathon. The full marathon consists of 13 laps of a 3.25 km illuminated mining tunnel circuit, while the half marathon is completed after seven laps.

6 laps of 3.3 km each