North America is the third largest continent in area and the fourth ranked in population. It is bounded on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the south by the Caribbean Sea, and on the west by the North Pacific Ocean. It covers an area of 9,355,000 square miles (24,230,000 square kilometres). In 2001 its population was estimated at 454,225,000.

The "home stretch" of the expedition takes us through Alaska, Canada, Washington and Oregon, as the team makes its way back to the finish line in California.