RACE RULES & SAFETY REQUIREMENTS

All vehicles must:

   Be approved before qualifying or racing
&

Be properly tagged

 

It is the driver’s responsibility to ensure their vehicle is maintained and able to compete safely, our team is only inspecting the following components for general safety.

Occupants must be able to enter and exit the vehicle quickly and unassisted in any position.

All vehicles must have a full metal firewall separating occupants from engine and fuel systems.

Required and must:

• Cover entire area from pedals to behind seats
   
• Extend from outer edge to outer edge
   

Vehicles must be free of loose objects, including:

• Tools
   
• Sub boxes
   
• Jacks
   
• Recovery gear
   
• Coolers
   
• Fuel containers
   
• Clothing
   

• Required front and rear
   
• Clearly marked
   
• Secure and rated for vehicle weight
   

• Full face (dirt bike or motorcycle style)
   
• Open face allowed
   
• No beanie/skull bucket helmets

• All competitors must wear a neck brace.
   

• Snell or DOT approved
   
• Must display certification sticker
   
• Full face strongly recommended

• HANS or Hybrid device required
   
• Foam neck rings are not permitted
  
   

Shatter-resistant eye protection required for all competitors.

• Fire-retardant outerwear required
   
• Coveralls NOT approved
   
• Must cover neck to ankles and wrists
   
• One-piece suits recommended
   

• Single-layer fire suit required (coveralls NOT approved)
   
• No holes, tears, or thinning
   
• Must be free of petroleum contamination
   
• Two-layer suit recommended
   
• Fire-resistant gloves and footwear strongly recommended
   

All classes must have:

• Two 2.5lb fire extinguishers
   
  • One mounted outside
     
  • One mounted inside cab
     

• OEM belts acceptable (good condition)
   
• 5-point harness highly recommended
   

• 5-point harness required
   

All vehicles must carry:

• Winch line weight or synthetic winch line
   
• Recovery strap
   
• Shackle
   

Not required, but strongly recommended.

All vehicles must have:

• Doors or door bars
   
• Protection at shoulder height
   

• Metal plate above occupants
   
• Hands must not pass brow bar when seated
   

Roll cages are mandatory for all classes.

• 1.75" x .120 wall tubing (main structure)
   

• Minimum 2" x .120 wall tubing
   

• Minimum 2" x .188 wall tubing
  OR
   
• 2" x .120 double halo with heavy trussing
   

Additional Requirements:

• X or Y brace behind driver
   
• Seat belt bar 1–2 inches below shoulders
   
• Minimum 5" clearance above helmeted heads
   

• Participants responsible for spills
   
• No fluid disposal on site
  
   

• Kill switch recommended
   
• Wiring must be secure and protected from abrasion
   

• Securely mounted fuel tanks
   
• No ratchet straps or bungee cords
   
• No jerry cans or marine fuel cans
   

• Approved fuel cells required
   
• OEM tanks allowed
   
• Alcohol and nitromethane permitted
   

Definition:
Any vehicle modified for off-road recreational use.

Tire Size:
30" – 43"

Definition:
Purpose-built off-road vehicles intended for racing or competition.

Tire Size:
44" and over

Definition:

This is a truly unlimited class.

• Any tire size allowed
   
• Must have achieved a podium finish in any off-road race event within the last two years
   
• First-place Big Tire winners must move up to Pro
   
• Course will be longer and more challenging than Big Tire
   
• Once entered, the only way to be removed is by placing dead last in Mountain Top Madness
   

Thunder Mountain Off Road Park officials reserve the right to modify, amend, or update rules at any time to ensure safety and fair competition.