• 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 Closed Sept. 14-30

    The road linking West Thumb and Old Faithful is closed for the season—traffic should detour through West Thumb, Lake, and Canyon. The road from Mammoth to Norris is closed for two weeks—traffic should detour over Dunraven Pass. More »

2012 OSV Noise Emissions Test Results

This page displays the results from noise emissions tests conducted on February 24, 2012 and March 8, 2012. Files are named according to the Manufacturer Model (year, nickname) followed by the Noise Test Date. For example: "Bombardier B-12 (1953, Chip) – 2014.1.24"

Arctic Cat TZ1 (2010) - 2012.03.08 (244 KB pdf)

Ford E-350 Vanterra (2011, SY3) - 2012.03.08 (263 KB pdf)

Ford F-550 Krystal (2011, SY8) - 2012.03.08 (266 KB pdf)

Ski-Doo Expedition Sport 600cc (2012) - 2012.03.08 (270 KB pdf)

Snow Grizz (2013) - 2012.2.24 (244 KB pdf)

Did You Know?

Dog Hooked to Travois for Transporting Goods.

Some groups of Shoshone Indians, who adapted to a mountain existence, chose not to acquire the horse. These included the Sheep Eaters, or Tukudika, who used dogs to transport food, hides, and other provisions. The Sheep Eaters lived in many locations in Yellowstone.