• A bull elk bugles in Yellowstone National Park

    Yellowstone

    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 »

Tracking the Hot Spot

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Moving in a southwesterly direction at the rate of one inch (2.5 cm) per year, the North American continental plate has passed over a shallow chamber of partially molten rock, leaving behind a trail of volcano tracks.

Over the course of 16.5 million years, approximately 15-20 massive eruptions have left immense calderas (craters) to dot the landscape from the Nevada-Oregon border through Idaho’s Snake River Plain to Yellowstone National Park. Eventually the movement of the plate brought the Yellowstone area into contact with the shallow body of magma and the stage was set for more volcanic fireworks!

Did You Know?

Summer Crowd at Old Faithful.

At peak summer levels, 3,500 employees work for Yellowstone National Park concessioners and about 800 work for the National Park Service.