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.
Drive-in:
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.