Ултра маратон 1000km Balkan Charity Challenge
A typical challenge sport endurance format for 11 days combining biking and running of near 100 km per day on average without interruption.
Ултра маратон 1000km Balkan Charity Challenge
A typical challenge sport endurance format for 11 days combining biking and running of near 100 km per day on average without interruption.