Each ATV or RUV is limited to one class. See general rules

Open Class

• Any ATV may participate.
• All ATVs must run ATV tires specifically designed and marketed for ATV use.
• No tracks, automotive tires or agricultural tires are allowed to run in this class.  Paddle tires designed and marketed for ATVs will be allowed to run in this class.
• Participants may custom cut their tires as long as the tire is an approved ATV tire for the event, but cannot add any type of material to the treads.
• Axle paddles, wheel paddles and dual wheels will not be allowed in this class.
• Any engine modification can be made, but the engine must be an ATV engine.  Motorcycle, snowmobile or other engine conversion is not allowed.
• The ATV cannot exceed 78” in width and 102” in length measured tip of tire to tip of tire.
• Nitrous Oxide is permitted in the open class.
• Turbos are allowed in the open class
• Custom fuel tanks are allowed in this class and they can be relocated at the racers discretion.  The tank must be of adequate construction and must have adequate protection.  High Lifter will make final determination.

Lite, Bogger, Pro A and Pro B

• Both IRS and SRA style ATVs will run in these classes.
• No motor swaps are allowed in the Lite, Bogger, Pro A or Pro B Classes.  You must run the same motor designation that was originally installed at the factory.
• No Aftermarket jugs or intake(s) will be allowed to run in these classes.
• General intake and exhaust porting, port matching is allowed as long as there is no cutting, welding or epoxy, etc. in or on the intake(s) and exhaust.  Any and all work done to the intake(s) must be limited to clean up of stock parts.
• All ATVs must run ATV tires specifically designed and marketed for ATV use.  No tracks, automotive tires, cut tires, paddle tires or agricultural tires are allowed to run in this class.
• ATVs may run up to 3” of total lift.  One replacement control arm is allowed on each corner but stock length axles must be retained.  You cannot replace both upper and lower control arms on any one corner.
• Standard engine modifications are allowed to include over bore kits, jet kits, pipes, air filter, etc. as long as the total cc limit is not exceeded for the class.
• This class will not allow special fuels such as alcohol or nitrous oxide.
• Turbos are not allowed to race in this class.
• Axle paddles, wheel paddles, dual wheels, extended swing arms, extended a-arms, solid bars replacing shocks, etc. are not allowed in these classes.
• No frame modifications are allowed that will change the overall length or width or will change the factory position of the axles forwards or backwards (no sweeping axles forward or backwards and no relocating differentials).  The only exception to this is that ATVs with front struts may adjust the front outer axle hub location so that the axles are approximately 90 degrees coming out of the front differential.  They still cannot sweep forward beyond 90 degrees off the differential.
• These classes are designed for ATVs to race with what is considered traditional or standard mud racing accessories readily available to the average rider.
• Any ATV entered in this class that is determined by High Lifter to exceed this description will be moved up to the first appropriate class.

The following rules are specific to each of the classes listed below.

Pro A Class

• The Pro A Class will include all twin cylinder ATVs 500ccs and up with a 53” wheelbase or less (including 53”).

Pro B Class

• The Pro B Class will include all single and twin cylinder ATVs 500ccs and up with more than a 53” wheelbase.

Bogger Class

•  The Bogger Class will include all single cylinders ATVs 500ccs and up with a 53” wheelbase or less (including 53”).

Lite Class

• The Lite Class will include all single cylinder ATVs that are 499ccs and below and all ATVs with a foot shift from the factory.

RUV Class

• This will be an open class with the same rules that apply to the ATV Open Class.  This class can carry a passenger but is not required to carry a passenger.
• The passenger must wear the same safety gear and must be at least 16 years old and sign all waivers.
• The driver and passenger must stay in the RUV cockpit during the race.  Neither the driver nor passenger may exit the RUV at any time during the race to push or pull for safety reasons.  This includes hanging arms and or legs from the vehicle during the race.
• If the RUV is about to turn over, the driver or passenger may assist in preventing the roll over but may not push.
• High Lifter’s decision on this will be final.

Women’s Open Class

• The Women’s Open Class will be an open class race for women with the same rules that apply to the regular ATV Open Class.

Summary of Classes

Lite            0 - 499ccs and all foot shift ATVs
Bogger      500 and up (Single Cylinder only)
Pro A        500 and Up (Twin Cylinders 53” wheelbase or less)
Pro B        500 and Up (Single and Twin Cylinders over 53” wheelbase)
Open         must be ATV engine
RUV          must be ATV engine
Woman      must be ATV engine