The challenge is to walk or run 50 kilometers over 50 days – from 5 June to 24 July - in order to raise money to plant 500m2 of forest by Foundation Hëllef fir d'Natur of Natur&Ëmwelt, fighting against deforestation and global warming.

The sign-up fee is only 5 EUR, although bigger donations are possible. The money will go to finance the Hëllef fir d'Natur Luxembourg Foundation of Natur&Ëmwelt, planting of 500 m² of forest. Such a forest ecosystem would absorb about 50 tonnes of CO2 from the atmosphere over 100 years.

Registration can be done via https://www.njuko.net/run-hike-walk.../select_competition and kilometers are tracked via an app (Racemap). Participants can register individually and as a team (for instance RCL J), from Luxembourg or elsewhere.