The Winter Wolves of Yellowstone National Park

"We're going to follow that bald eagle up the river," said veteran Yellowstone guide Leslie Quinn as we watched the magnificent bird flap past. Leslie threw into gear his bright yellow Bombadier—a vintage 1960s snowcoach shaped like a gumdrop reclining on tank treads—and crunched up the snow-packed road into the heart of the world's oldest national park....» Full Story