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Yellowstone National Park, Wyo. » Bears are beginning to emerge from hibernation in Yellowstone National Park.
Spring doesn't start for three weeks and wintry weather will linger longer than that in Yellowstone. But grizzly bear tracks already have been seen east of Mammoth Hot Springs in northern Yellowstone.
That's prompting park officials to issue their annual warnings for visitors.
Stay at least 100 yards away from bears. Travel in groups of three or more. Make noise on the trail. Keep food inside cars or bear-proof containers. And keep an eye out for bears.
Yellowstone officials say pepper spray is a proven last line of defense against a charging bear.
