• A bull elk bugles in Yellowstone National Park


    National Park ID,MT,WY

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  • Craig Pass Closed for the Season; Mammoth to Norris, Expect 30-minute Delays

    The road linking West Thumb and Old Faithful is closed for the season—traffic should detour through West Thumb, Lake, and Canyon. More »

Yellowstone in Winter: Supporting Science & Technical Documents

The National Park Service conducts ongoing monitoring in winter for soundscapes, air quality, wildlife, and personal health and exposure. The agency uses such monitoring as part of its ongoing winter use management. Below is a list of annual reports for each of these subjects.

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Did You Know?

Bear Cubs

Even though the animals of Yellowstone seem tame they are still wild. Feeding the animals is not permitted in any way, and all visitors must keep 100 yards away from wolves and bears, and 25 yards from other animals.