The Camp Grayling Joint Maneuver Training Center at Grayling, MI is the largest National Guard training facility in the United States. It comprises 148,000 acres of four-seasons training lands, 337 square-km of restricted airspace, and up to 6000 Hz spectrum available. Camp Grayling supports the summer and winter Northern Strike joint exercises, and National Guard Exportable Combat Training Center Exercises. Camp Grayling provides premier facilities including a Combined Arms Collective Training Facility, two impact areas for indirect fire and aerial weapon systems up to 500-pounds, and three live-fire shoot houses. Specialized facilities include the Maneuver Area Training Equipment Site for pooled equipment, Multipurpose Range Complex capable of armor/crew served weapons and Combined Live Fire Exercise, and an Army Airfield with two 5,000-foot runways.