Three other men pleaded not guilty in the May 14 incident.
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The four walked away from designated Yellowstone National Park trails onto the protected Grand Prismatic Spring.
Yellowstone lodge workers were left a piece of unconventional feedback after a disappointed tourist encountered zero bears during their trip.
YELLOWSTONE NATIONAL PARK, Wyo. - Yellowstone National Park authorities will not try to capture a female grizzly that killed a backcountry hiker because it was trying to defend its cubs when it was su...