Rock Classes
| Class Name | Numbers | Category | Class Description |
|---|---|---|---|
| R400: Unlimited | 4400 - 4499 | Rock | Unlimited |
| R900: Pro Open UTV | O4900 - O4999 | UTV Rock | Open UTV |
| R900: Pro Modified UTV | M4900 - M4999 | UTV Rock | Pro Modified UTV |
| R900: UTV Stock | S4900 - S4999 | UTV Rock | Stock |
| R500: Modified | 4500 - 4599 | Rock | Modified |
| R600: Stock Class | 4600 - 4699 | Rock | Stock |
| R800: Legends | 4800 - 4899 | Rock | Legends |