Boston Cut-off Time Prediction Contest

Boston Cut-off Time Prediction Contest

Predict the 2027 Boston Cut-off Time and win a great prize and bragging rights among all your running friends.

Submit Your Prediction

ENDS 5PM EDT FRIDAY, 9/18!


Best Boston Marathon Qualifiers for 2026

Best Boston Marathon Qualifiers

It's here! Our annual list of the year's
best marathons to help you qualify for the Boston Marathon.

2026 IS HERE!


Marathon Pace Bands

Marathon Pace Bands

Run the Right Pace in Your Next Marathon

Nearly 500 marathon courses.
Ships same or Next Day


Fox Valley Marathon

St. Charles, IL
Sunday, September 20, 2026


  4.7 Stars from 6 Reviews

Course Description

The Fox Valley Marathon offers a fast, scenic road race that winds through the tranquil suburbs west of Chicago, Illinois. The race is a USATF-certified route and a Boston Marathon Qualifier. The flat course has just approximately 90 feet between the high and low points.

The course begins and ends in downtown St. Charles near the edge of Mt. St. Mary Park. From the starting line, the route transitions quickly out of the city sectors to guide runners south along the Fox River, traveling directly through the neighboring historic river towns of Geneva and Batavia before turning back northward to the finish line.

Much of the course is run on the Fox River Trail system, which keeps runners separated from vehicle traffic. Runners cross over multiple pedestrian bridges and pass local landmarks, including waterfront parks, local waterfalls, and an authentic Dutch windmill in Batavia.

A smart pacing strategy centers on locking into a highly consistent pace from the opening miles to fully capitalize on the flat terrain and extensive shade. Because the minor rollers are brief, goal success depends on maintaining a steady state and monitoring hydration, particularly if mid-September temperatures are warm on race day.






Marathon Pace Bands

Want to run your best Fox Valley Marathon?

Don't waste months of training only to run the wrong pace.


Fox Valley Marathon Pace Bands are adjusted for the specific terrain of the course, your goal time and pacing strategies.



Only $9.99





Race Information

Race Dates

2027: TBD
2026: Sunday, September 20, 2026

Course Information

Profile: Mostly Flat
Type: Out and Back
Surface: Road/Pavement

Boston Qualifier?: Yes
World Marathon Major Qualifier?: No


Race Day Weather

Mean Temp.: 63°F (17°C)
Average High: 74°F (23°C)
Average Low: 51° F (10°C)





PR Score & Course Score

PR Score: 97.58
Course Score: 98.92


Race Size

2026: No Results
2025: 497 Finishers
2024: 450 Finishers
2023: 447 Finishers
2022: 412 Finishers
2021: 177 Finishers

BQ Percentages

2026: N/A
2025: 3.2%
2024: 2.4%
2023: 7.6%
2022: 5.6%
2021: 10.2%

Miscellaneous Information

Pace Groups?: Yes

2026 Race Day Weather Forecast


Race Day Temperatures

High: 69°F  (21°C)
Low: 63°F  (17°C)

Race Start Conditions

65°F  (18°C)

Rain
NE 11 mph 

PR Score
(Normal Score)

95.03
(97.58)

Course Score

98.92

The typical race time temperature and humidity levels are above the ideal range for optimal marathon performance. You may need to adjust your time goal, especially if you are not acclimated to higher temperatures and/or humidity.






Fox Valley Marathon Rankings, Course Speed & Boston Qualifier Statistics

The Fox Valley Marathon was the 138th largest marathon in the U.S. in 2025 based on the number of finishers. In 2024, it ranked as the 143rd largest marathon in the U.S..

In 2025, 3.2% of Fox Valley Marathon finishers achieved Boston Marathon qualifying times. In 2024, 2.4% of finishers qualified for Boston.

Based on its percentage of Boston Qualifiers (BQs), the Fox Valley Marathon ranked 363rd among marathons in the U.S. in 2025 and 384th in 2024. In Illinois, it ranked 9th in 2025 and 10th in 2024. These rankings provide a useful benchmark for runners comparing Boston Marathon qualifying potential across different races.


The Fox Valley Marathon has a Course Score of 98.92, ranking it as the 234th fastest marathon course in the U.S. and the 8th fastest marathon course in Illinois.

Typical race-time temperature and humidity levels are above the ideal range for optimal marathon performance. Combined with the course profile, this gives the Fox Valley Marathon a PR Score of 97.58. The PR Score ranks the Fox Valley Marathon as the 325th best marathon in the U.S. for running a Personal Record (PR) and the 7th best marathon for a PR in Illinois.

Together, these rankings provide a quick snapshot of how the Fox Valley Marathon compares with other marathons in the U.S. and Illinois for speed, PR potential, Boston Marathon qualifying success, and overall participation.

Fox Valley Marathon Marathon Rankings Summary
Course Speed234th fastest marathon course in the U.S.
Ranked 8th fastest marathon course in Illinois
Top 51% Nationally#8 of 10 in Illinois
PR Potential325th best marathon for a Personal Record in the U.S.
Ranked 7th best marathon for a PR in Illinois
Top 70% Nationally#7 of 10 in Illinois
Boston Qualifier Rate363rd highest BQ percentage in the U.S.
Ranked 9th highest BQ percentage in Illinois
Based on 2025 Boston Marathon qualifying results
Top 76% Nationally#9 of 13 in Illinois
Race Size138th largest marathon in the U.S.
Ranked 4th largest marathon in Illinois
Based on 2025 results
Top 24% Nationally#4 of 13 in Illinois

Learn more about PR Scores and Course Scores on the FAQ page.




Elevation Chart


Max Elevation: 743 feet (226m)
Min Elevation: 656 feet (200m)

Elevation Gain: 499 feet (152m)
Elevation Loss: 499 feet (152m)


Fox

Course updated 06/10/2026





Hotel & VRBO Accommodations for the Fox Valley Marathon

View available accomodations around the Fox Valley Marathon Finish Line and Course. Book your Reservation now before the best places are sold out.

For a better mobile or desktop experience:







Compare the Fox Valley Marathon to other Marathons

Use tools below to compare races and convert times across courses.

Do you want to see how the Fox Valley Marathon stacks up against other marathons?

Compare the details of the Fox Valley Marathon side-by-side with other marathons with our Comparison Tool.


If you ran the Fox Valley Marathon in 5:01:00, what would your time in other marathons be?

See how your finish time would compare on other marathon courses with our Time Conversion Tool.




Race Reviews


4.7
Based on 6 reviews
Write Your Own Review

I missed my turn :(

Full Review:

This is a pretty nice, fairly flat marathon with the exception of a few short inclines. Parking is easy, start area is efficient and easy to navigate. The course is quite nice. A great experience for a first time marathoner. Be very aware of the turn at mile 7 - left the first time, STRAIGHT the second time.

Race Tips:

Expect a few short hills. Know the course map well. There are not any clocks along the course and there was only one split mat at mile 7. watch out for the second loop on the course. I turned left and did the loop twice because all of the volunteers were yelling, "marathoners go left" even though I thought I was supposed to go straight after completing one loop. But I was tired and not thinking straight, so I added 6 miles to my marathon and missed out on BQing because of it.

Great!

Full Review:

I liked the atmosphere and there was plenty of parking. There was gatorade and water available at miles 3, 6, 8, 10, 11, 13, 14, 16, 18, 19, 21, 22, 23, 24, 25. I'm not sure how many port-a-pottys there were but there were a good amount. There were pacers for the half and full marathon and the course was well marked. It was very hilly in my opinion however (my garmin watch counted 3000+ ft of elevation loss and gain).

Race Tips:

Try to run with the pacers or keep an even pace until 20 miles. Then, if you feel good, increase your pace a bit until the end!

Travel/Logistics Tips:

I arrived to the area around 6:30am and the race started at 7. The parking garage was full, but there was plenty of parking around the area. They send out a public parking map with different areas you can park at, so it was very easy!

Great race

Full Review:

If your looing for a local marathon and don't want to deal with crowds at Chicago this is the best race in the area. I have ran it 5 times and have found it very well organized.

Race Tips:

The pacing is ok but not the best. watch your time.

Full Review:

FANTASTIC RACE! BQ Here

Full Review:

This is a great race: fast, mostly flat, shady (although a warm 82ish at race end), organized, well staffed. You can BQ here and sign up during week 2 of Boston registration. You should run this race if you are anywhere near St. Charles.

PROS: Pre-race info is detailed and available on website well ahead of time; lots of options on packet pick up; lots of hotels and restaurants in the area. Course is well marked, well supported throughout, and aid stations are well run - but maybe a bit far apart in some places. Beautiful course around the river, over a few short bridges, lovely scenery in an alpine-like town. Post-race massages! (sign up as soon as you exit food tent). Lots of volunteer support, and they are very friendly. Quick pick up of race results via QR code on your bib. EASY for your race supporters to get around and meet you at specific places - great info on parking and meeting spots. Only about 700 marathoners, but you start with 1300 additional runners (1/2 and 20 milers). Wave start, so not terribly crowded for long.

CONS: BEWARE!! The pacers may not 1) run an even race 2) run at their designated pace 3) meet their time goal (either over or under!). Plan to pace yourself, and don't let the pace groups mess with your head. It is a mostly flat course, so you can plan on even splits. Post-race food isn't that great. I wish I could have found an interactive course map ahead of time instead of having to rely on their pdf version.

This is a fun race just because everyone is so happy!

Race Tips:

1- pace yourself; go for even splits; DON'T LET THE DOWNHILL START THROW YOU OFF PACE - you can't make it up, and there are a couple of inclines at the end where you'll need your energy - stick with your goal pace (DO NOT RELY ON THEIR PACERS)
2- course is shady for 19 miles or so - enjoy that
3- very few rolling hills; you will have some short inclines in the last 8 miles
4- easy parking for race day - got there about 45 minutes before the start - bathroom lines took about 20 minutes, so plan ahead
5- aid stations are a little far apart at times, plan ahead
6- it's easy to have people meet you along the course for course support - great info on parking for them, it's not crowded, so you can spot them, they can see you around 5-6 times if you want. Due to the locations of the aid stations, I had someone refresh my handheld water bottle, which I usually don't do. it worked perfectly.
7- It can be HOT for the last hour. in 2017, we started at 65 deg and finished at 82ish. Stay hydrated

Travel/Logistics Tips:

Plenty of hotels and restaurants in the area. Parking is well marked on the race guides. I got there 45 minutes ahead of time. Traffic was not that bad. Easy to meet up after the race. HIlton Garden let me have 1pm check out, so I could shower after the race. IAgain, would use this to BQ - not the Last Chance to BQ even though they are run by the same people and use a similar course. Generally, you can still sign up for Boston on the Monday of the 2nd week of registration. You can get in if you beat your BQ time by just a few minutes.

Full Review:

Beautiful course up and down the river. Nice and flat, no tight spots. Very well organized. Tons of support from volunteers and local community spectators. Plenty of hydration options throughout the course. Plenty of porta-potties. Very attractive high tech T-shirt and medal.