Who will be crowned the next MBOS Champion? Join us this weekend for all the action as the 2016 MBOS Season comes to a close at Sierra Vista HS! Not able to be with us in person? Check out the Marching Band Open Series – MBOS Facebook page for our exclusive MBOS “On the Track” and MBOS “On the Field” segments for a LIVE look at the action and interviews with performers and staff members throughout the day! Don’t forget to get the official WGASC/MBOS NOW! app for the Winter Guard Association of Southern California and the Marching Band Open Series. Get up to the minute News, Scores, and Event information for all WGASC and MBOS events for ONLY 99¢! Search “WGASC” in your Apple App Store or Google Play Store for Android. Check it out MBOS NOW! App Info