7 October 2013
The tenth jubilee edition of the "Drag-Cherni Vrah" competition of mountain biking, cross-country race, took place on October 5th, 2013. Over 200 participants passed the 40-km route from Boyana to Cherni Vrah and back with much enthusiasm and satisfaction. Sopharma AD was again a partner to the rally and was highly appraised by both organizers and participants.