Become an AMBC member today and support the trails you love! Your membership dues are shared between AMBC and the Southern Off-Road Bicycle Association (SORBA), funding efforts both locally and across the Southeast. As a member, you’ll also enjoy exclusive benefits through both AMBC and SORBA. Easily manage your membership through the SORBA App, powered by Hivepass. Sign up now using the portal on this page, or download the app to your mobile device. Simply scan the QR code or click one of the links below to get started!