Denis Cook, from Bethesda, MD, leaps into the air and clicks his heels during the  Massanutten Mountain Trails 100 Mile run (MMT 100) May 17, 2008..The  race is considered one of the toughest Ultra Marathons on the east coast. The  Massanutten Mountain Trails 100 Mile run (MMT 100) May 17, 2008.<br /> The  race is considered one of the toughest Ultra Marathons on the east coast.
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