Push the Limits

M Mountain Cat Alpha One

$18,599 Starting USD*

With bold styling and bolder moves, the Mountain Cat is built for next-level riding. By incorporating cutting-edge features, the Mountain Cat shows even the most diehard thrill-seekers the ride of their lives.

New For 2025

A THRILL SEEKER'S DREAM

M 858 Mountain Cat ALPHA ONE

All New 858 C-TEC2™ Engine
FOX® FLOAT QS3 Shocks
Power Claw™ Track
Arctic Cat G8 Digital Display

This configuration is unavailable for online pre-order at this time. Local dealers may have additional inventory while supplies last.

Choose your ideal sled configuration to fit your riding style.

8 AVAILABLE CONFIGURATIONS PRICE MY SLED

Build This Sled

M 858 Mountain Cat ALPHA ONE

All New 858 C-TEC2™ Engine
FOX® FLOAT QS3 Shocks
Power Claw™ Track
Arctic Cat G8 Digital Display

This configuration is unavailable for online pre-order at this time. Local dealers may have additional inventory while supplies last.

$18,599

This configuration is unavailable for online pre-order at this time. Local dealers may have additional inventory while supplies last.

TRACK LENGTH & LUG HEIGHT

146"/2.60"

154"/2.60"

154"/3.00"

165"/3.00"

TRACK TYPE

PowerClaw

STARTER

Manual

Push Button Electric

SUSPENSION

AWS

COLOR

Continue to Customize Select & Close

New For 2025

BUILT TO PUSH THE LIMITS

M 858 Mountain Cat ALPHA ONE with ATAC

All New 858 C-TEC2™ Engine
FOX® FLOAT iQS Shocks with ATAC
Power Claw™ Track
Arctic Cat G8 Digital Display

This configuration is unavailable for online pre-order at this time. Local dealers may have additional inventory while supplies last.

Choose your ideal sled configuration to fit your riding style.

8 AVAILABLE CONFIGURATIONS PRICE MY SLED

Build This Sled

M 858 Mountain Cat ALPHA ONE with ATAC

All New 858 C-TEC2™ Engine
FOX® FLOAT iQS Shocks with ATAC
Power Claw™ Track
Arctic Cat G8 Digital Display

This configuration is unavailable for online pre-order at this time. Local dealers may have additional inventory while supplies last.

$18,699

This configuration is unavailable for online pre-order at this time. Local dealers may have additional inventory while supplies last.

TRACK LENGTH & LUG HEIGHT

146"/2.60"

154"/2.60"

154"/3.00"

165"/3.00"

TRACK TYPE

PowerClaw

STARTER

Manual

Push Button Electric

SUSPENSION

AWS

COLOR

Continue to Customize Select & Close

Arctic Cat Snowmobiles - CATALYST - 858 Engine

A NEW BREED OF POWER

ALL NEW 858 ENGINE

The all-new 858 two-stroke engine is designed for seamless integration into the new CATALYST platform. With an 8% increase in displacement, this engine houses an 11% increase in output over the C-TEC2 800 and weighs 4% less. It features an optimized air intake system, a new exhaust valve design for more consistent power and cleaner emissions, and an all-new crankcase for increased stroke and integrated engine mounts.

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Arctic Cat Snowmobiles - Mountain Sleds - M Mountain Cat ALPHA ONE

PEAK PERFORMANCE UNLOCKED

CATALYST CHASSIS

The revolutionary CATALYST platform has been built from the ground up to optimize every aspect of your ride, so much so that you’ll feel at one with the sled. With enhanced ergonomics, a lower center of gravity, our exclusive laydown engine design, specially calibrated suspension and more, this changes everything.

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NAVIGATION AT YOUR FINGERTIPS

ARCTIC CAT G8 DIGITAL DISPLAY

The all new Arctic Cat G8 digital display, powered by Garmin, offers seamless integration with your sled. A built in GPS with preloaded trail maps, customizable data fields and phone connectivity are just some of the features that make G8 essential for every ride. Plus, the group ride functionality utilizes VHF radio or cellular data, dependent on region, to share the ride with up to 15 people.

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OPTIMIZED FOR DEEP SNOW

AWS 36 FRONT SUSPENSION

The AWS 36 Front Suspension was designed specifically with the M 858 Mountain Cat in mind. With lightweight spindles and precision engineered geometry, this suspension system optimizes your performance in deep snow.

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INCREASED DURABILITY

ARCTIC CAT MOUNTAIN BELT DRIVE

The CATALYST platform utilizies Arctic Cat's belt drive system rather than a chain drive. This allows for enahnced durability and fewer parts in the system. The adjustable center distance allows for multiple ratio options and makes servicing simple.

UNPARALLELED VERSATILITY

FOX FLOAT QS3 SHOCKS

ALPHA ONE suspension is easily adjustable for ride and intensity with FOX FLOAT® shocks: from the three-position QS3 on the ski and front arm, to a semi-locking QSL on the rear, you get easy adjustability for maximum deep snow performance.

QUICKLY CONNECT

ATACH LATCHING SYSTEM

Adding accessories to your sled is a snap with this 4-point latching system. You can install and remove accessories in seconds, so no matter where you are, you can customize your sled with ease.

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UNMATCHED CONTROL

ALPHA ONE SINGLE-BEAM REAR SUSPENSION

Arctic Cat’s revolutionary single-beam rear suspension changes the game for mountain snowmobiles. The unique monorail design sheds snow to keep your sled light and equalizes floatation across the width of the track. ALPHA ONE offers enhanced maneuverability, giving you tighter turns than ever before.

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BRIGHTEN ANY RIDE

ASYMMETRICAL LED HEADLIGHT

A premium LED headlight is crucial to optimize your visibility. Equipped with both high and low-beams, this headlight casts an LED light pattern with great range and width. Plus, with its unique asymmetrical design, everyone will know that you're on an Arctic Cat.

SMOOTH POWER DELIVERY

ADAPT CVT SYSTEM

With its lightweight, narrow design that increases performance and belt life, as well as the industry’s only self-adjusting clutch, the ADAPT™ CVT system provides better throttle response, smoother power delivery and a ride like no other.

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Customize

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M Mountain Cat ALPHA ONE

Vehicle Specs

Print Specs

	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One ATAC
Engine Type	8000 C-TEC2, 2-Stroke	8000 C-TEC2, 2-Stroke	8000 C-TEC2, 2-Stroke
Displacement	794cc	794cc	794cc
Cooling	Liquid	Liquid	Liquid
Cylinders	2	2	2
Bore x Stroke	85 x 70 mm	85 x 70 mm	85 x 70 mm
Lubrication	Electronic Injection	Electronic Injection	Electronic Injection
Ignition	Digitally Controlled CDI	Digitally Controlled CDI	Digitally Controlled CDI
Engine Stator Output	270 W @ 3000 RPM	270 W @ 3000 RPM	270 W @ 3000 RPM
Fuel Delivery	Next Generation C-TEC2	Next Generation C-TEC2	Next Generation C-TEC2
Exhaust	APV with Tuned Pipe, Pipe Sensor and Stainless Steel Manifold and Muffler	APV with Tuned Pipe, Pipe Sensor and Stainless Steel Manifold and Muffler	APV with Tuned Pipe, Pipe Sensor and Stainless Steel Manifold and Muffler
Fuel Capacity	10.4 gal (Manual Start), 11.7 gal (Electric Start)	10.4 gal (Manual Start), 11.7 gal (Electric Start)	10.4 gal (Manual Start), 11.7 gal (Electric Start)
Oil System Capacity	3.25 qt.	3.25 qt.	3.25 qt.
Coolant System Capacity	5 qt.	5 qt.	5 qt.
Minimum Octane	91	91	91

	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One ATAC
Drive Clutch	ADAPT CVT	ADAPT CVT	ADAPT CVT
Driven Clutch	ADAPT CVT	ADAPT CVT	ADAPT CVT
Drive System	Arctic Mountain Drive System	Arctic Mountain Drive System	Arctic Mountain Drive System
Brakes	Stealth Hydraulic Master Cylinder with Lightweight Caliper	Stealth Hydraulic Master Cylinder with Lightweight Caliper	Stealth Hydraulic Master Cylinder with Lightweight Caliper
Clutch Calibration	6,000-8,000 ft.	6,000-8,000 ft.	6,000-8,000 ft.
Gearing	19/50	19/50	19/50
Chain Pitch	96	96	96
Track Drive Sprocket	7 Tooth, 3.5 Pitch, Exvolute or 8 Tooth, 3.0 Pitch, Exvolute (varies by model)	7 Tooth, 3.5 Pitch, Exvolute or 8 Tooth, 3.0 Pitch, Exvolute (varies by model)	7 Tooth, 3.5 Pitch, Exvolute
Reverse	Push-Button Engine	Push-Button Engine	Push-Button Engine

	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One ATAC
Front Suspension	Arctic Mountain Suspension (AMS)	Arctic Mountain Suspension (AMS)	Arctic Mountain Suspension (AMS)
Ski Shocks	FOX FLOAT 3 QS3	FOX FLOAT 3 QS3	FOX FLOAT 3 iQS
Sway Bar	N/A	N/A	N/A
Front Travel	7 in.	7 in.	7 in.
Rear Suspension	ALPHA-ONE Rear Suspension	ALPHA-ONE Rear Suspension	ALPHA-ONE Rear Suspension
Front Track Shock	FOX FLOAT 3 QS3 or Arctic Cat IFP 1.5 (varies by model)	FOX FLOAT 3 QS3 or Arctic Cat IFP 1.5 (varies by model)	Arctic CAt IFP 1.5
Rear Track Shock	FOX FLOAT 3 QSL	FOX FLOAT 3 QSL	FOX FLOAT 3 iQSL
Rear Travel	14 or 15 in. (varies by model)	14 or 15 in. (varies by model)	14 or 15 in.

	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One ATAC
Overall Chassis Length	132 or 137 in. (varies by model)	132 or 137 in. (varies by model)	132 or 137 in. (varies by model)
Overall Chassis Width	42.5-44.5 in.	42.5-44.5 in.	42.5-44.5 in.
Overall Chassis Height	50 in.	50 in.	50 in.
Track Type	Power Claw	Power Claw	Power Claw
Track Width	15 in.	15 in.	15 in.
Track Length	154 or 165 in.	154 or 165 in.	154 or 165 in.
Lug	3 in.	3 in.	3 in.
Pitch	3.50 in.	3.50 in.	3.50 in.
Ski Stance	35.5-37.5 in. - Adjustable	35.5-37.5 in. - Adjustable	35.5-37.5 in. - Adjustable
Ski Type/Width	G2 ProClimb - 7 in.	G2 ProClimb - 7 in.	G2 ProClimb - 7 in.
Runner Type	Single Runner with Carbide	Single Runner with Carbide	Single Runner with Carbide

	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One ATAC
Type of Gauge	Deluxe Digital	Deluxe Digital	Deluxe Digital
Speedometer	Digital	Digital	Digital
Tachometer	Digital	Digital	Digital
Odometer	Digital	Digital	Digital
Fuel	Digital	Digital	Digital
Oil	Indicator Light	Indicator Light	Indicator Light
Coolant	Digital/Indicator Light	Digital/Indicator Light	Digital/Indicator Light
Clock	Digital (only available on select models)	Digital (only available on select models)	N/A
Battery Voltage	Digital (only available on select models)	Digital (only available on select models)	N/A
Altimeter	Digital (only available on select models)	Digital (only available on select models)	Digital
Hours	Digital	Digital	Digital

	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One	M 8000 Mountain Cat Alpha One ATAC
Color	Dynamic Charcoal/Blue	Dynamic Charcoal/Blue	Dynamic Charcoal/Blue
Heat Exchanger	Front/Short Tunnel	Front/Short Tunnel	Front/Short Tunnel
Starter	Manual or Electric Push-Button	Manual or Electric Push-Button	Manual or Electric Push-Button
Handlebars	Hooked with Grab Handle, 4.5 in. Riser	Hooked with Grab Handle, 4.5 in. Riser	Hooked with Grab Handle, 4.5 in. Riser
Lighting	LED with Accent Light	LED with Accent Light	LED with Accent Light
Seating	Lightweight Mountain or Mountain (varies by model)	Lightweight Mountain or Mountain (varies by model)	Lightweight Mountain
Storage Components	M Tunnel Bag	M Tunnel Bag	M Tunnel Bag
Additional Accessories	Handguards, Heated Drivers Seat (only available on select models), Mirrors, Rear Racks, Side Panel Wind Deflectors, Sno Pro Hooked Brake Lever, Tow Hitch, Tunnel Flare, Visor Plug-In	Handguards, Heated Drivers Seat (only available on select models), Mirrors, Rear Racks, Side Panel Wind Deflectors, Sno Pro Hooked Brake Lever, Tow Hitch, Tunnel Flare, Visor Plug-In	Handguards, Heated Drivers Seat (only available on select models), Mirrors, Rear Racks, Side Panel Wind Deflectors, Sno Pro Hooked Brake Lever, Tow Hitch, Tunnel Flare, Visor Plug-In
Standard Accessories	12V Outlet, Goggle Holder, Hand and Thumb Warmers, Ice Scratchers, Lightweight Mountain Brake Disc, Sport Front Bumper, Tether Switch, Vertical Steering	12V Outlet, Goggle Holder, Hand and Thumb Warmers, Ice Scratchers, Lightweight Mountain Brake Disc, Sport Front Bumper, Tether Switch, Vertical Steering	12V Outlet, Goggle Holder, Hand and Thumb Warmers, Ice Scratchers, Front Bumper, Tether Switch
Windshield	1 in. Mountain Height	1 in. Mountain Height	1 in. Mountain Height

Vehicle specifications are subject to change.

View All Specs

*Price includes a one year warranty. Price does not include freight or set-up fees and is subject to change.

WARNING: Arctic Cat snowmobiles can be hazardous to operate. For your safety, all riders should read and understand their owner’s manual and safety instructions. Always wear an approved helmet and other safety apparel. Be aware of natural hazards you may encounter and don’t drink and ride. All scenes depicted or described were performed by professional riders under carefully controlled conditions. Never attempt to duplicate these maneuvers or encourage others to do so. Arctic Cat recommends that all operators take a safety training course. For safety and training information, please see your local dealer.

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M Mountain Cat Alpha One

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Choose a Model

M 858 Mountain Cat ALPHA ONE

M 858 Mountain Cat ALPHA ONE

M 858 Mountain Cat ALPHA ONE with ATAC

M 858 Mountain Cat ALPHA ONE with ATAC

A NEW BREED OF POWER

PEAK PERFORMANCE UNLOCKED

NAVIGATION AT YOUR FINGERTIPS

OPTIMIZED FOR DEEP SNOW

INCREASED DURABILITY

UNPARALLELED VERSATILITY

QUICKLY CONNECT

UNMATCHED CONTROL

BRIGHTEN ANY RIDE

SMOOTH POWER DELIVERY

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M Mountain Cat ALPHA ONE

Vehicle Specs

Engine

Powertrain

Suspension

Dimensions

Instrumentation

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