• 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 »

2013-2014 OSV Noise Emissions Test Results

This page displays the results from noise emissions tests conducted on December 11, 2013, December 13, 2013, and January 24, 2014. 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 (2014a) - 2013.12.11 (244 KB pdf)

Arctic Cat TZ1 (2014b) - 2013.12.11 (244 KB pdf)

Arctic Cat TZ1 (2014c) - 2013.12.11 (244 KB pdf)

Arctic Cat TZ1 (2014d) - 2013.12.11 (244 KB pdf)

Arctic Cat TZ1 (2014e) - 2013.12.11 (245 KB pdf)

Bombardier B-12 (1953, Chip) - 2014.1.24 (277 KB pdf)

Bombardier B-12 (1953, Sally) - 2014.1.24 (277 KB pdf)

Bombardier B-12 (1956, Griz) - 2013.12.11 (273 KB pdf)

Bombardier B-12 (1965, Rosebud) - 2013.12.13 (277 KB pdf)

Bombardier B-12 (1979, Shoshone) - 2013.12.13 (276 KB pdf)

Chevy Express 3500 (2011, SY7) - 2013.12.11 (244 KB pdf)

Chevy Suburban (2007, SY6) - 2013.12.11 (244 KB pdf)

Ford E-350 Vanterra (2011, SY3) - 2013.12.11 (263 KB pdf)

Ski-Doo Grand Touring LE 900cc (2014, high torque) - 2014.01.24 (244 KB pdf)

Ski-Doo Grand Touring LE 900cc (2014, low torque) - 2014.01.24 (244 KB pdf)

Ski-Doo Renegade Sport 600cc (2014) - 2014.01.24 (263 KB pdf)

Tucker Sno-cat (2014) - 2014.01.24 (244 KB pdf)

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.