Question: What St. Louis monument built to honor the westward expansion of the U.S. is near a 1.25 oval race track?
Sentence (from "Gateway Motorsports Park"): It features a 1.25-mile (2 kilometer) oval used by the NASCAR Camping World Truck Series and IndyCar Series, a 1.5 mi infield road course used by SCCA and various car clubs, and quarter-mile drag strip that hosts an annual National Hot Rod Association event.
Relevant evidence: Yes