Hidden money
On the Farm Road track, go under the train trestle in the middle
of the pond to
find $1500.

On the Restricted Area track, go straight when you pass through
gate 5. After a
little driving you will reach an aircraft hanger with a jet
inside. In the corner
of the hanger is a chest of cash.

On the Laguna Del Ray track, off on the right is a small island
just offshore. On
top the island is a chest of cash.

Between gate 6 and 7 on the Black Gold track is a fenced-in area
that contains
another box of cash. There is an oil truck nearby it.

When starting on the Treasure Bay track, go over to the beached
tanker boat to
the right, and drive around on the water side. You can find a
chest in the side
hull, with $666.

On the Truck Stop 101 track, go to the "hidden" highway and drive
alongside the
right side of the road. You will eventually find a chest of cash.