Green Mountain Freestyle Center in Williston, Vermont. Is an indoor trampoline training and foam pit facility designed for the progression of action sports athletes! We focus on freestyle trampoline training for snowboarders, skiers, skateboarders and anyone who wants to learn body control and air awareness while flipping and spinning in a low risk environment! With a full schedule of after school training programs, open gyms and private coaching sessions, GMFC has training opportunities for everyone. GMFC provides programs for private teams or group training. We also hold Summer camps, birthday parties and corporate events.