What St. Louis monument built to honor the westward expansion of the U.S. is near a 1.25 oval race track?
Gateway Motorsports Park: Gateway Motorsports Park (formerly Gateway International Raceway) is a motorsport race track in Madison, Illinois, just east of St. Louis, Missouri, United States, close to the Gateway Arch. Gateway Arch:  Built as a monument to the westward expansion of the United States, and officially dedicated to "the American people," it is the centerpiece of the Jefferson National Expansion Memorial and has become an internationally recognized symbol of St. Louis, as well as a popular tourist destination.
i don't know