A challenging, rocky 100 miler on the trails of the Massanutten Mountains in the George Washington National Forest in Virginia’s Shenandoah Valley. The course includes short but rugged mountain climbs with more than 18,000 feet of total ascent. There is a 36-hour cutoff. After running it, we think you’ll agree:Massanutten Rocks!The MMT is a challenging 100 mile trail ultra over a demanding, rocky course in the Massanutten Mountains of Virginia’s Shenandoah Valley. The course includes short but rugged mountain climbs that total over 18,500 feet.