When the Yellowstone River gets too dangerous to swim in, an otter mom leads her pups across icy terrain to a calmer section of the river - a journey that's sped up by their sliding skills, across the snow.
Yellowstone River is the longest undammed river in the contiguous 48 states, flowing with a wildness that is both violent and vital to the creatures that are drawn to its banks. From Yellowstone Lake, North America's largest high-elevation body of water, to the Missouri River, follow its nearly 700-mile journey over falls and through canyons into America's heartland. See how Yellowstone's bison, otters, coyotes, and thrill-seekers adapt to--and thrive in--these wild, untamed waters.
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