The Chicago Marathon, known for its flat and fast course, offers a perfect fall race. Runners should keep their race gear close to avoid issues. Bike shares and Ventra cards are recommended for easy travel around the city.

Pre-race activities include the Believe in the Run shakeout run and a Chicago architecture cruise. Make early dinner reservations to avoid long waits. Carry electrolytes and carbs for energy throughout the expo. Read more gear coverage.

On race day, stick to familiar pre-race foods and scale up carb intake. Hydrate well and use handheld hydration. The marathon offers 20 aid stations with various fuel options. Plan your nutrition to maintain marathon pace. Related: Insider Tips for Running the Berlin Marathon.

This original Runner World brief is based on reporting from Believe in the Run. Visit the source for its complete reporting, context and any later corrections.