The 2026 Fox Valley Marathon has concluded.Share your finish
The 2026 Fox Valley Marathon Races have been cancelled due to extended setup delays caused by incidents of lightning. Packet and finisher medal pickup is staged in the downtown St. Charles parking garage beginning at 7:00 AM. All registrants are considered finishers for Endurance Medal streaks.

Fox Valley Marathon

Race complete
St. Charles, IL, USA · September 20, 2026
rain67°·67° high·Breezy·Light rain
5
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Race Day Weather

rain
67°at start
68° high
Breezy
Rain likely
Your goal
0:00:00

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.

rain4
cloudy4
rain4
partly-cloudy-day5
rain5
cloudy5
rain5
rain5
rain5
rain4
rain4

Pace Calculator

26.2mi
0:00:00
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Race Plan

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 Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

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. Source

Race weekend

Sunday, September 20
7:00 AMMarathon (26.2 mi)
7:00 AMHalf Marathon (13.1 mi)
7:00 AM20M (20.0 mi)
7:10 AM5K (3.1 mi)

FAQ

When is the 2026 Fox Valley Marathon?

The 2026 Fox Valley Marathon will be held on Sunday September 20, 2026.

Is the Fox Valley Marathon a Boston Marathon Qualifier?

Yes, the Fox Valley Marathon is an official Boston Marathon qualifier.

What is the time limit for the Fox Valley Marathon?

The time limit for the Fox Valley Marathon is 6 hours.

What will the weather be like for the 2026 Fox Valley Marathon?

The forecast calls for a high of 69°F and a low of 61°F with a 100% chance of rain.

Historical Weather

Based on 15 years of data
Avg Temp
65°F
L:59° H:70°
RunScore
6
Conditions
Rain Freq
27%
4 of 15 yrs
Wind6mph
Dew58°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-day
66°/73°-
4
2024
partly-cloudy-day
69°/71°Light
4
2023
rain
59°/62°Light
6
2022
cloudy
69°/78°-
4
2021
clear-day
59°/80°-
4
2019
cloudy
72°/78°Light
3
2018
clear-day
65°/81°-
3
2017
partly-cloudy-day
67°/81°-
4
2016
clear-day
55°/72°-
6
2015
clear-day
48°/66°-
8
2014
clear-day
55°/61°-
7
2013
clear-day
43°/63°-
8
2012
clear-day
47°/70°-
7
2011
cloudy
54°/56°Light
8
2010
partly-cloudy-day
53°/65°-
7