Mysteries in Our National Parks

Summary: Who was that man in the Park Service uniform who brought Jack and Ashley Landon into the wilds of Alaska's Denali National Park along with their friend Nicky Milano? Whoever he was, he has given them a dogsled ride to certain death unless somebody finds them soon. Their troubles are about to get a whole heap deeper as the first rumblings of an avalanche turn into a deafening roar!