Best Available Technology (BAT) Snowmobiles

The “New BAT” designation refers to a snowmobile that meets the park’s Best Available Technology (BAT) standard. As of December 15th, 2015, all snowmobiles entering the park must operate at or below 67 dBA and must be certified to a Family Emission Limit (FEL) no greater than a total of 15 g/kW-hr for hydrocarbons and 90 g/kW-hr for carbon monoxide. A snowmobile will be certified for six consecutive winter seasons following its manufacture or until the snowmobile travels 6,000 miles, whichever occurs later. See the table below for a list of approved snowmobiles.

View a list of local businesses that rent New BAT snowmobiles.

Approved Snowmobiles - Model Years 2015-2019

Snowmobile Air Emissions (g/kW-hr) Sound Emissions (dBA)
Hydrocarbons Carbon Monoxide
2019 - Bombardier (Engine Family KBCXY.6007GF) 6 90 67
Renegade Sport 600 ACE
Grand Touring Sport 600 ACE
Tundra Sport 600 ACE
Tundra LT 600 ACE
Expedition Sport 600 ACE
2019 - Bombardier (Engine Family KBCXY.8997GF) 6 75 67
Grand Touring Limited 900 ACE
2018 - Bombardier (Engine Family JBCXY.6007GF) 6 90 67
MX-Z Sport 600 ACE
Renegade Sport 600 ACE
Grand Touring Sport 600 ACE
Tundra Sport 600 ACE
Tundra LT 600 ACE
Expedition Sport 600 ACE
2018 - Bombardier (Engine Family JBCXY.8997GF) 6 75 67
MX-Z TNT 900 ACE
MX-Z Blizzard 900 ACE
Renegade Adrenaline 900 ACE
Renegade Enduro 900 ACE
Grand Touring LE 900 ACE V
Grand Touring SE 900 ACE
Expedition Sport 900 ACE
2018 – Yamaha (Engine Family JYMXY1.04BDB) 7 31 66
Yamaha RS10Y
2017 - Bombardier (Engine Family HBCXY.6007GF) 6 90 67
Ski Doo MX-Z Sport 600 ACE
Ski Doo Renegade Sport 600 ACE
Ski Doo Grand Touring Sport 600 ACE
Ski Doo Tundra Sport 600 ACE
Ski Doo Tundra LT 600 ACE
Ski Doo Expedition Sport 600 ACE
2017 – Bombardier (Engine Family HBCXY.8997GF) 6 75 67
Ski Doo MX-Z TNT 900 ACE
Ski Doo MX-Z Blizzard 900 ACE
Ski Doo Renegade Adrenaline 900 ACE
Ski Doo Renegade Enduro 900 ACE
Ski Doo Grand Touring LE 900 ACE V
Ski Doo Grand Touring SE 900 ACE
Ski Doo Expedition Sport 900 ACE
2017 - Yamaha (Engine Family HYMXY.104BDB) 6.26 31 66
Yamaha RS10Y
2016 – Bombardier (Engine FamilyGBCXY.6007GF) 8 90 66
Ski Doo MX-Z Sport 600 ACE
Ski Doo Renegade Sport 600 ACE
Ski Doo Grand Touring Sport 600 ACE
Ski Doo Tundra Sport 600 ACE
Ski Doo Tundra LT 600 ACE
Ski Doo Expedition Sport 600 ACE
2016 – Bombardier (Engine Family FBCXY.8997GF) 8 90 67
Ski Doo MX-Z TNT 900 ACE
Ski Doo Renegade Adrenaline 900 ACE
Ski Doo MX-Z Blizzard 900 ACE
Ski Doo Renegade Enduro 900 ACE
Ski Doo Grand Touring LE 900 ACE
Ski Doo Expedition Sport 900 ACE
2016 – Yamaha (Engine Family GBCXY1.04BDB) 7 31 66
Yamaha RS10Y
2015 – Bombardier (Engine Family FBCXY.6007GF) 8 90 66
Ski Doo MX-Z Sport 600 AC
Ski Doo Grand Touring Sport 600
Ski Doo Expedition Sport 600 ACE
Ski Doo Renegade Sport 600 ACE
Ski Doo Tundra LT 600 ACE
Ski Doo Tundra Sport 600 ACE
2015 – Bombardier (Engine Family FBCXY.8997GF) 8 90 67
Ski Doo MX-Z TNT 900 ACE
Ski Doo Renegade Adrenaline 900 ACE
Ski Doo GSX LE 900 ACE V
Ski Doo Grand Touring LE 900 ACE
Ski Doo Expedition Sport 900 ACE

Snowmobiles older than 2015 model years are not approved.

Overview of BAT Requirements

Air Emissions (g/kW-hr) Sound Emissions (dBA)
Hydrocarbons Carbon Monoxide
Average 2-Stroke (Non-BAT) 150 400 78
NPS New BAT Requirements 151 902 673


1Hydrocarbons: certified by EPA to a Family Emissions Limit (FEL) of 15 g/kW-hr or less.

2Carbon Monoxide: certified by EPA to a Family Emissions Limit (FEL) of 90 g/kW-hr or less. Air emission figures for carbon monoxide and hydrocarbons presented are either the Official Test Results (OTR) or the certified FEL. The Official Test Results are actual measured emissions.

3To operate in the park after March 15, 2015, a population of measurements for a snowmobile model may not exceed a mean output of 67 dBA, and a single measurement may not exceed 69 dBA, using the J1161 test procedures.

 
Snowmobiles and a snowcoach ride by a small group of bison

Ride a Snowmobile or Snowcoach

Take a guided tour of wintry Yellowstone.

Snowmobile rider taking photo

Snowmobile Access Program

Learn about our non-commercially guided snowmobile program.

Visitors on a snowmobile talk with a park ranger

Snowmobile Access Program Logistics

Review the logistics and regulations for the Non-commercially Guided Snowmobile Access Program.

Last updated: September 12, 2019

Contact the Park

Mailing Address:

PO Box 168
Yellowstone National Park, WY 82190-0168

Phone:

307-344-7381

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