CMRO and NON-CMRO – Extreme Mudfest 2023 – Cold Lake, Alberta



CMRO & NON-CMRO Rules & Regulations


The Canadian Mud Racer’s Organization (CMRO) has no express implied warranty of safety resulting from publication of, or complaint with these rules. They are intended as a guideline for conduct of the sport and are in no way a guarantee against injury or death to spectators or participants.

Participants are expected to be alert to inherent hazards of Mud Racing competition and are expected to exercise good safety precautions and procedures.


The primary responsibility for the safe conduction and operation of a racer in competition rests with vehicle owner and driver. The promoter assumes major responsibility for the operation of a safe race event. The total responsibility for racing’s progress must be shared by everyone associated with the sport. Close observance of the standards set forth in this rulebook is an important fundamental. The standards set forth by the CMRO will serve as guidelines based upon experience and professional mud racing. The CMRO also serves as coordinator and facilitator between the professional racers, the pit or facilities manager, and the promoter.


Each member and/or participant agrees to familiarize him/herself with all applicable rules and regulations prior to competing in any CMRO sanctioned Race event.

A member and/or participant expressly agree that the act of entering a CMRO sanctioned event shall constitute agreement by him/her to be bonded by all the rules and regulations covering the event.

The participant agrees to be bounded by any decisions of the promoter and the CMRO Executive.

The member also agrees to release and waiver from liability, and agrees not to bring any action against the promoter, the CMRO, or the event facility, event sponsors or any event officials for any loss, damage or injury caused by decision, erroneous or otherwise, whether based on negligence or otherwise, or by actions taken by the event director, the CMRO Executive or other event officials during the course of the event whether such actions competition negligence or otherwise.

“Participant” includes any person directly or indirectly associated with a vehicle lawfully upon the premises for the purpose of competition, included but not limited to, owners, drivers, and crew people.

The authority of the CMRO Executive to make decisions shall include and cover any facet of any kind in connection with pits, the conducting of competition, behavior of contestants, and shall include the right to suspend, bar, expel, or disqualify from the competition without liability of any kind.

All drivers of competing vehicles will be given a Liability Waiver to read and sign before entering a vehicle in completion.

All competing drivers must have a valid driver’s license and be at least 16 years of age with parent or guardian signed approval. Any competing driver caught without a valid driver’s license will be suspended from CMRO for five (5) years.

A vehicle cannot be entered into any class more than once. Registration and technical inspection of vehicles will be done at the designated area on the first day of the event.

All vehicles must pass a safety inspection before entering the event.

If two or three members own a vehicle together; they must use the same CMRO competition number.

During the competition year, the CMRO office must be notified in writing after a sale and before the vehicle is registered for the next event. Should a competitor be forced to withdraw (scratch) from an entered class due to breakage or be unable to compete, the withdrawal must be made prior to the start of the class on the first day’s competition. The competitor will be required to notify the event clerk (timing booth) of his/ her withdrawal. At that time, the event fee will be refunded – the competitor will not receive any points for attending the event.

Once a competitor has pulled up to the start line, whether they have a measurable run or not, they will not be refunded their entry fee.

Class jumping is permitted at registration only, NO EXCEPTIONS! A competitor is only allowed to bump up 1 or 2 classes (i.e. Street Stock can only go up to Mod Stock or Pro Stock- NO FUTHER)

Drivers will draw for running order, per class, at each event. Reverse order on the second day.

Driver’s meetings are held 2 hours before the event is to start. All competitors must attend the driver’s meeting on both days, unless attending only 1 day, the driver must attend the driver’s meeting for that day. At any sanctioned event, it is mandatory for all drivers to attend any particular driver’s meetings that may be called by the Promoter or the officials.

No late entrants allowed once the running order has been posted for that day.

There must be a min of three (3) entrants to make a class; otherwise entrants will be bumped up to compete in the next higher class.

Any vehicle that passes inspection in their own class does need to be re-teched for a higher class, with a separate Tech sheet filled out and signed

A strict 10km speed limit is enforced in both the pit and camp area.

No vehicles shall run before 9:00am or after 9:00pm in the pit or camp areas, unless an official escorts the vehicle.

No vehicles are allowed in the competition area (Stage & Shut down) during competition other than the competition vehicles. No spectators or unnecessary vehicles allowed.

Competition vehicles must be operated in a safe manner at all times, in the pit area, during staging and unloading. The CMRO Executive and/or the pit officials have the right to stop and even disqualify any vehicle from the event if that vehicle is not being operated in a safe manner.

Any person in the pit or competition area found to be under the influence of alcoholic beverages, regardless of the amount until the end of competition day, shall be evicted from the even. Such conditions are cause for suspension of competition privileges for the period of one (1) year at any CMRO sanctioned event. CMRO Executive will handle any suspensions by written letter.


Racer’s primary objective is to drive a 4×4 vehicle through a pit of sand or mud as fast and as far as possible and become the overall champion. CMRO afford every Race an equal opportunity at the title. Mud racing competition consists of classes for vehicles used in everyday aspects of the street, to classes that are designed for the professional vehicle that is not driven on the street.

Individuals compete against the clock in attempt to have the fastest time while driving through a sand/mud pit. In order to allow each competitor the fairest start possible.

*NEW to 2015 Season is REACTION TIME in all classes*

Time starts when the light turns green and stops when the vehicle crosses an electronic beam at the finish line. Individuals compete against the clock. Winners in each class are determined by the combined time from both days’ runs (using the best 3 of 4). The fastest combined time determines the winner. In the event that the electronic timer fails, a rerun will be awarded. If a complete run is not made, a measurement to the front of the vehicle is used to determine the distance traveled. Winners in each class are determined by combined distance from both days’ runs. The farthest combined distance is the winner. Distance and time are kept on all runs. In the event of a tie, the combined distance plus the combined time is used, with the fastest time determining the winner.

Distance and /or time are awarded to the vehicle, not the driver. A vehicle may only compete ONCE in any class.

If a racer is the first to pass through the pit, that pass can be thrown away if the driver has attended the driver’s meeting.

All competing vehicles stage with the staging light and must come to a complete stop before breaking the start beam. Failure to stop will result in an automatic disqualification (DQ) for that pass. Staging time is the time it takes to be at the start line in your running order. Pit officials have the authority to decide on the eligibility of a particular run. Competitors and their vehicles should be prepared to be on time for their run and be in the staging order. Reasonable staging time is at the discretion of pit officials. All vehicles must be pulled forward. Only exception is if a vehicle breaks down within the 1st twenty-five feet, the driver can opt to be DQ’d for the pass and be pulled out backwards.

Staging must be done under the vehicles own power.

Reverse at any time during a run is an AUTOMATIC DQ!! Once you have broken staging beam you can no longer back up.

Any vehicle that comes out of the pit or in contact with any equipment is DQ’d for that run.

If a vehicle starts at the lights before the green light and the red light comes up on the tree, you will be DQ’d.

If a driver or his/her passenger removes their helmet or exits the vehicle in the pit, you will be DQ’d.

Once a vehicle has ceased forward motion and been flagged, it is not permitted to move again.

Vehicles that dig unnecessary holes in the pit are automatically disqualified for that run.

Exhibition Runs – Non-members must be teched and run Saturday at the end of the day with a cost of $25.00 per run. Members can run at the end of their class at no charge on either day. No points or money will be awarded.

Driver’s hands must be visible to the flagman during hook-up.

In Non Nitrous classes, Pit officials check to ensure that Nitrous bottles are sealed and tapped off.

Any competitor found to be running illegal will forfeit all points acquired during current race year and be fined the amount of any race payouts won. Fines must be paid back to CMRO prior to the competitor competing in the next high class for the remainder of the race year, if the vehicle meets the standard of the lower class the next year, the competitor shall be allowed to race in the lower class again.

Violation of any governed rule shall constitute a disqualification.


  1. The safety / rule committee consists of NINE (9), ONE MUST BE THE PRESEDENT who is knowledgeable in the mechanical aspects of 4-wheel drive vehicles and who have been nominated for this position.
  3. Rules used for inspection are CMRO approved rules and regulations.
  4. All CMRO competing vehicles are inspected at the 1st event of the season, and can be inspected again at any time during the season.
  5. Any competition vehicles not previously inspected must be inspected before entering any event.
  6. The Safety/Rule Committee shall have the final authority on any alleged regulation infraction. Pit official, CMRO members or non-members, cannot overrule committee decisions.
  7. The Committee must be informed when any rule-governed alteration has been made to a previously inspected vehicle. The committee shall determine the legality of any such alteration.
  8. An inspected competitor who has made an illegal alteration as determined by the Rule/Safety Committee, shall be banned from competition for one year from the date of the infraction.
  9. A checklist form is used for initial inspection and kept by Safety/Rule committee. Any alterations are noted on original form.
  10. Protests are filed according to CMRO rules and regulations. All teardowns are done by the Safety/Rule Committee, or in their presence.
  11. The CMRO member at the end of the pit will have a fire extinguisher with them at all times.


Points are tabulated through the CMRO office to establish a year-end Overall Point Champion and a 1st, 2nd, and 3rd place Champion in each class.

The overall champion is awarded to the vehicle that has accumulated the most points in a single class per season. The 1st, 2nd, and 3rd place champions in each class are awarded to the vehicles that have accumulated the most points in each class per season. Current point standings can be obtained by checking with the CMRO office or the CMRO web site Points are awarded on a one-vehicle format. To receive points, the vehicle must be registered with the CMRO for the current season and the event must be sanctioned. If at any time during the season a vehicle change occurs, a new set of points will be started. If a vehicle breaks down during an event, no vehicle can be substituted for that vehicle. Any vehicle proven to be competing illegally by the Safety/Rule Committee will automatically lose all points accumulated. All points awarded are the property of the vehicle and cannot be transferred to another vehicle or class. A vehicle owner may sell the vehicle, including the registration number and accumulated points. All points for all classed will go with the vehicle. Registered vehicles receive on “Show up” point if there is not a full class. Ten points are given at fall and spring meetings for attendance.

Points are awarded in the following manner for all classes per heat as follows:

1st = 7pts; 2nd = 6pts; 3rd = 5pts; 4th = 4pts; 5th = 3 pt 6th and up = 2 pt

Bonus overall event place: 1st = 3pts, 2nd = 2pts, 3rd = 1pt

One (1) extra point is awarded to break the starting beam (per run, to a max. of 4 points per class per event). A vehicle must attempt to run in the pit to qualify for any points. One (1) extra point is awarded for breaking finish beam. Points are not awarded to nonmembers.

Any competitor found to be running illegal will forfeit all points acquired during current race year and be fined the amount of any race payouts won. Fines must be paid back to CMRO prior to the competitor competing in the next high class for the remainder of the race year, if the vehicle meets the standard of the lower class the next year, the competitor shall be allowed to race in the lower class again.

Prizes are awarded at year-end for 1st, 2nd, and 3rd place in each class: Street Stock, Mod Stock, Pro Stock, Super Stock, Pro-Modified and Super Modified.

Tie Breaker:

If there is a tie for 1st, 2nd or 3rd for any title, the following will determine the champion:

Most 1st place finishes for the season.

Most 2nd place finishes for the season.

Most 3rd place finishes for the season.


  1. Street Stock and Mod Stock vehicles must have seatbelts. Pro Stock must have a 4 point seatbelt or have original seatbelts. Superstock, Pro Mofied and Superstock classes must have 4 point seatbelt.
  2. CSA approved helmets and seatbelts must be worn during competition and pullout and drivers must be clothed from wrist to toe.
  3. All drivers of alcohol and nitrous powered vehicles must wear a minimum SFI single layer race suit or a safety equivalent suit to accommodate larger size racers.
  4. Co-drivers (passengers) must have the same equipment and follow the same rules as drivers AND ONLY ALLOWED IN STREET STOCK, MOD STOCK AND PROSTOCK CLASSES. No passengers are allowed to ride in the top 3 classes.
  5. A minimum 2.5lb dry chemical fire extinguisher mounted for easy access is required in all classes. An on board 5lb fire system is required on all alcohol burning or blown (supercharged) vehicles.
  6. Batteries must be secured and are NOT allowed in the driver’s compartment unless they are completely enclosed or are a dry cell battery AND VENTED IF IN DRIVERS’ COMPARTMENT.
  7. No fuel lines, fuel pumps or fuel pressure gauge lines are permitted in the driver’s compartment, unless OEM or NHRA approved gauges have been installed.
  8. Nitrous Oxide may be in the driver’s compartment if properly mounted and vented to the outside of the driver’s compartment.
  9. All competing vehicles must have a hard top or OEM roll cage. All open top vehicles and vehicles in Pro-Modified and Super Modified must have a minimum 6-point roll cage (attached to the frame). Roll cage must be competition roll cage consisting of 1 5/8″ x 0.95 wall thickness mid steel tubing or 1 5/8″ x .065 wall thickness, 4130 chrome molly tubing for the main 6-point cage structure. Any vehicle with a roll cage built prior to 11/09/96 will be accepted pending Safety Committee approval.
  10. Super stock must run full production carb and windshield, unless it has an approved roll cage. If any gutting of cab interior vehicles in Super Stock must run a roll cage of the same standard as Pro-Modified and Super Modified. If any gutting of cab interior, interior gutting must be kept to a minimum in street stock, mod stock and pro stock.
  11. All competing vehicles must have a windshield or a piece of lexan in front of the driver, or the driver must wear goggles.
  12. All vehicles must have adequate tow hooks with 2 points of attachment for towing.
  13. All classes, except Street Stock and Mod Stock, must have transmission and clutch shatter shields (1/4″ aluminum, or 1/8″), transmission blanket or 1/2″ minimum conveyor belt.
  14. All u-joints must have a 360 degree guard around (2″ min. with, steel 1/16″ or aluminum 1/8″) excluding street stock and mod stock.
  15. Drive shafts must have a drive shaft loop every 24″ or minimum 1 per shaft at the front of the shaft. Loop must be made of 3/8″ round steel or 1/2″ round aluminum or equivalent, excluding Street Stock and Mod Stock.
  16. All vehicles must have functional brakes and steering system.
  17. All vehicles with engine driven fan blades are required to have a fan shroud.
  18. No loose objects are permitted in the vehicle during competition.
  19. All vehicles must have fuel tanks of fuel cells properly mounted inside the confines of the frame / roll cage and outside of drivers compartment.
  20. All Super charged vehicles are required to use aluminum blower studs and have NHRA approved blower restraints. Blower belt shields are required.
  21. All competing vehicles must be equipped with full floor pan under the driver’s compartment and a firewall between the driver and the engine(s). These must be a minimum thickness of 0.06″ and must be constructed of sheet metal or aluminum. Vehicles built before rule change requires OEM.
  22. Nitro Methane is prohibited in all classes.
  23. All Superstock, Pro-modified and Super Modified vehicles must have a kill switch mounted on the back of the vehicle clearly visible and accessible location. The switch must kill ALL power in the vehicle.

If no neutral safety switch is used, a person must be in control of the vehicle.


Additional information regarding CMRO can be found at :