DULUTH, MN (KDAL) - Spirit Mountain is hosting the Nature Valley NASTAR Midwest Championships this weekend.  Regional winners will have an opportunity to qualify for the National Championships at Aspen in March.  Individual races and team races will be featured with the action taking place on the Blue Ruin Trail.  Check-in is Friday and racing will be held on Saturday and Sunday.  A Racer Reception will be held on Saturday night with live music.  Get more information at www.skiracing.nastar.com