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September 20, 2026
St. Charles, IL
7/19 Trail Preview Run Cancelled
The Fox Valley Marathon's Sunday West River Trail Preview run has been cancelled. The Air Quality Index forecast from IQAir (Batavia Air Quality Index (AQI) and USA Air Pollution | IQAir USA) moves from unhealthy for sensitive groups to unhealthy at 1:00 AM Sunday and climbs higher as the morning progresses.
With that in mind and everyone's goal of productive training, quick recovery, and best chances for a successful race day, we are cancelling Sunday's Trail Preview Run.
We recommend you do your 7-Mile or 14-mile run today or Monday when air quality forecasts are significantly better and look forward to seeing you in two weeks at Dick Pond Athletics in St. Charles for our 8-Mile and 16-Mile East Trail Preview Runs.
New for 2026 ...
- 13.1, 20, & 26.2: "decline shirt" option saves $15 vs 2025
- 20 & 26.2: trail improvements ( new maps posted)
- Changes for all courses. Read details here
- 5 Year Medal Series and Discount
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About
Combining small race atmosphere with big race amenities, the Fox Valley Marathon, Half Marathon, Fall Final 20 and Fox Valley 5K 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 and North 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.
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