Fox Valley Marathon
Race Day Weather
Mild rain, adjust pace accordingly
Runners will face temperatures starting at 68°F and holding steady at 65°F to 68°F throughout the event. With light rain expected at a rate of 0.10 in/hr, humidity will remain high at 95%, creating a muggy environment. Wind will be moderate at 14 mph from the NE, with a mix of headwind, tailwind, and crosswind on the course. Runners should adjust their pacing strategies and ensure adequate hydration to combat the humidity.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Fox Valley Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized Fox Valley Marathon race plan
A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
Race Info
Combining small race atmosphere with big race amenities, the Fox Valley Marathon, Half Marathon, and Fall Final 20 are ideal for both veterans looking for a fast race, as well as first timers looking for an uncrowded, supportive, family-friendly race setting. Starting and ending in historic downtown St Charles, IL, the course winds through picturesque Geneva, Batavia, North Aurora, and Aurora to a spectacular finish across the Fox River that can be seen from over a mile away. The course offers fantastic viewing spots for families and supporters, as well as frequent and well positioned aid stations that are staffed by the most supportive volunteer teams of any race you’ve run.