The International Mountain Bicycling Association is the leader in mountain bike advocacy, education, promotion, and trail creation. Our mission is to create, enhance, and protect great places to ride mountain bikes. Since 1988, we have taught and encouraged low-impact riding, grassroots advocacy, sustainable trail design, innovative land management practices and cooperation among trail user groups. IMBA U.S is a national network of local groups, individual riders and passionate volunteers working together for the benefit of the entire community.