Set the weather to "Snow" and begin game play on the Breakneck Ridge track. A puck will appear on the icy area of the track.
Torture Pit Track:
While Racing on Sidewinder Canyon, race to the 4th checkpoint. Go past the bridge and make a quick right going through the barricades. Follow the dirt path and stop after the first bridge and make a right onto another bridge and follow that bridge to the end. You will see a checkpoint that will say "Pit." Go throught the checkpoint and follow the on screen instructions and you'll get the track.
On Scrapyard Run, at the fourth checkpoint there is a building with a truck right outside and a chain link fence. Go through the fence and turn left on the road. The road just goes in a circle. Drive into the enclosure and you'll find a theater.