Fox Valley Marathon Races
The Fox Valley Marathon offers a fast, certified course ideal for PRs and first-timers.
Race Date
Sep 20, 2026
Location
Saint Charles, IL
Quick facts
- Date
- Sunday, September 20, 2026
- Location
- Saint Charles, Illinois
- Distance
- Half marathon (13.1 mi) + 26.2M, 20M, 5K run
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Yes
- Finishers on record
- 13,984
Highlights
Good For
Atmosphere
Course
The Experience
The Fox Valley Marathon, held annually in St. Charles, Illinois, is a well-established event known for its fast, certified course. Since its inception in 2010, it has become a favorite for runners seeking personal bests, attracting approximately 930 finishers in recent years. The race also draws participants from around 19 states, highlighting its appeal beyond the local community.
This event is designed to accommodate a range of runners, from seasoned athletes aiming for a quick time to those new to the marathon distance. The course is noted for its minimal elevation changes, making it a prime candidate for achieving a new personal record. With a repeat-runner loyalty rate of about 35%, the Fox Valley Marathon has cultivated a dedicated following who return year after year for the reliable race experience.
Race-provided description
Fox Valley Marathon, Half Marathon, Fall Final 20 and 5K in St. Charles, IL. Ideal for veterans looking for a fast race, as well as first-timers.
Course Info
USATF CertifiedCourse Type
Loop Course
Terrain
road
Surface
Paved
Difficulty
Ultra-Flat
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
USATF Certified Course
IL25040NM · 2025 Fox Valley Half Marathon
Relatively flat with minimal net elevation change. Loop course — start and finish are close together.
Course Map
View Course Map
Open on Google Maps
1 other map for this race
Quality Score
Standout7914 years running
~959 finishers a year
shrinking
35% returning runners
USATF certified
runners from 19 states
winner 1:11:02
typical high 77°F
Race Day Weather
5-year historical avgStart (Low)
60°
Afternoon (High)
77°
Warm — hydration strategy is key, start conservatively
0.2"
Precipitation
11 mph
Wind
71%
Humidity
Historical Finish Times
How 13,984 finishers actually crossed the line across 14 years.
Most recent
2025
Total finishers
13,984
Median time
2:15:38
Latest turnout
930
States
40
Turnout by year
2017–2025
Hover the histogram to inspect specific finish times.
Frequently asked
When is the Fox Valley Marathon Races?
The Fox Valley Marathon Races is held on Sunday, September 20, 2026.
Where does the Fox Valley Marathon Races take place?
It takes place in Saint Charles, Illinois.
What distances does the Fox Valley Marathon Races offer?
The half marathon (13.1 miles), plus 26.2M, 20M, 5K run.
Is the Fox Valley Marathon Races course flat and good for a PR?
The Fox Valley Marathon Races is a ultra-flat, loop course course. The course is USATF-certified, so finish times can be used for qualifying.
How many people run the Fox Valley Marathon Races?
HalfRuns has finish records for 13,984 runners who have completed the Fox Valley Marathon Races.
HalfRuns editorial — independent, no paid placement.
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