Off-Road Challenge
El Cajon Track
To play the El Cajon stage, go to the level select menu, then press the L button + R button + Up on the control pad. You should hear a drill sound. Then highlight the El Paso stage and hold down the Z button and press A.

Quick Start
To get a boost of speed at the start of the race, hit the gas when the announcer says "Go!"
 El Cajon Track
 Quick Start
 Gaudalupe Track
 Flagstaff Track
 Monster Trucks
Gaudalupe Track
To play the Guatalupe stage, go to the level selection screen, press the R button + Down on the control pad. You should hear a drill sound. Then highlight the VEGAS stage hold down Z and press A.

Flagstaff Track
To get the secret level FLAGSTAFF, go to the level selection screen, hold L, then press RIGHT on the d-pad. You should hear a drill sound. Now highlight MOJAVE and hold Z + A.

Monster Trucks
To get monster trucks, press the respective button once at the car select screen. Press again to show the default truck:
Punisher: Down-C
4x4 Monster: Up-C
Thunderbolt: Left-C
The Crusher: Right-C
Credit Goes To: IGN 64