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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Fox Valley Marathon 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
HH:MM:SS
Pace
—

Enter a finish time to see what race day does to it.

Common Goals:

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Fox Valley Marathon route and elevation

The Fox Valley Marathon course has about 650 ft (198 m) of climbing and 650 ft (198 m) of descent, and finishes near the elevation it starts. It is flatter than 59% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. It has no steep miles: no mile climbs more than 55 ft (17 m).

Biggest climbs

  • Miles 0.2 to 2.9: climbs about 55 ft (16 m).
  • Miles 10.7 to 13.8: climbs about 55 ft (16 m).
  • Miles 17.5 to 20.6: climbs about 55 ft (16 m).

What the hills cost

  • 3:30 on a flat course is about 3:30:40 here (40 seconds slower).
  • 4:00 on a flat course is about 4:00:45 here (45 seconds slower).
  • 4:30 on a flat course is about 4:30:50 here (50 seconds slower).

Hills only, priced mile by mile on the course map. The pace calculator above adds the race-day weather.

Even-effort splits for a 3:30, 4:00 or 4:30 finish
The Fox Valley Marathon mile splits at even effort for three finish times, with each mile's climb and descent
MileClimbDescent3:304:004:30
126 ft26 ft7:589:0710:15
217 ft10 ft8:039:1110:20
346 ft18 ft8:139:2410:34
451 ft63 ft7:569:0410:12
538 ft75 ft7:508:5710:05
641 ft55 ft7:559:0310:11
734 ft43 ft7:579:0510:13
829 ft25 ft8:019:1010:18
937 ft25 ft8:059:1410:24
1044 ft76 ft7:518:5810:05
1130 ft17 ft8:059:1510:24
1226 ft24 ft8:009:0810:17
1323 ft12 ft8:049:1410:23
1443 ft39 ft8:019:0910:18
1514 ft30 ft7:559:0310:11
1642 ft32 ft8:049:1310:22
1746 ft65 ft7:549:0210:09
1823 ft16 ft8:029:1010:20
1928 ft25 ft8:009:0910:17
2021 ft14 ft8:039:1210:21
2143 ft50 ft7:579:0510:13
2242 ft16 ft8:129:2310:33
2311 ft21 ft7:579:0410:13
2432 ft33 ft7:589:0710:15
2528 ft7 ft8:099:1810:28
266 ft16 ft7:569:0510:13
Last 0.217 ft3 ft1:542:102:26

Explore the Fox Valley Marathon course with the weather and your pace along the route, or compare it with other races.

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

About the Fox Valley Marathon

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)

Fox Valley Marathon 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.

What is the elevation gain of the Fox Valley Marathon?

The Fox Valley Marathon course has about 650 ft (198 m) of climbing and 650 ft (198 m) of descent, and finishes near the elevation it starts. It is flatter than 59% of the marathon courses racecast.io has mapped, measured by what the hills cost in time.

Is the Fox Valley Marathon hilly?

Moderately. It has about 25 ft (8 m) of climbing per mile. It has no steep miles: no mile climbs more than 55 ft (17 m). 4:00 on a flat course is about 4:00:45 here (45 seconds slower).

What is the weather usually like for the Fox Valley Marathon?

Over the 16 years racecast.io has race-day weather for (2010 to 2026), it averaged 59°F at the start and 70°F by a typical finish. Rain fell during race hours in 5 of those years.

What was the hottest Fox Valley Marathon?

Of the 16 years on record, 2018 was the warmest, reaching 81°F during race hours. The coldest start was 2013, at 43°F.

What was the windiest Fox Valley Marathon?

Of the 16 years on record, 2014 was the windiest, with wind averaging 15 mph during race hours. The calmest was 2016, at 2 mph.

Fox Valley Marathon weather history

Based on 16 years of data
Avg Temp
65°F
L:59° H:70°
RunScore
6
Conditions
Rain Freq
31%
5 of 16 yrs
Wind7mph
Dew58°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
rain
65°/67°Light
5
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