• Visitors enjoy an eruption of Old Faithful from the Inn.

    Yellowstone

    National Park ID,MT,WY

  • Temporary Road Closures Possible!

    Snow is forecast for the Memorial Day holiday weekend. This could result in some temporary road closures. Updated Yellowstone road information is available by calling 307-344-2117.

Black Growler Steam Vent

A photo of Black Growler Steam Vent
 

The hottest of Yellowstone's geothermal features are steam vents (fumaroles).  Black Growler Steam Vent has measured 199 to 280 degrees F (93 to 138 degrees C).  A plentiful water supply would help cool these features; however, steam vents are usually found on hillsides or higher ground, above the basin's water supply.  They rapidly boil away what little water they contain, releasing steam and other gases forcefully from underground.

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Did You Know?

Bison in Yellowstone.

There are more people hurt by bison than by bears each year in Yellowstone. Park regulations state that visitors must stay at least 25 yards away from bison or elk and 100 yards away from bears.