http://www.mtbcult.it/91773/in-arrivo-il-3-corso-di-trail-building-di-imba-italia/
Potrebbe anche interessarti
http://www.4actionsport.it/mtb/2016/01/05/40288/
http://www.pinkbike.com/news/val-di-sole-to-host-imba-italia-trail-building-school-2017.html