SEPTEMBER 19, 2021, 6:50 a.m. (5K) 7 a.m. (13.1+) • ST CHARLES IL • MARATHON  • HALF MARATHON • FALL FINAL 20™ • 5K


FVM Deferral Deadline is 11:59 p.m. CST on 7/31


2021 Naperville Half Marathon (10/17/21)

2022 FVM (Date TBD)
(current distance or shorter)

There is a $30 Deferral Fee. Runners must register for deferral by 11:59 p.m. CST on 7/31

To defer, email us at by 11:59 p.m. CST on 7/31 and include the following statement with your information in the email:

Statement: I (INSERT NAME) wish to defer and acknowledge I am forfeiting my current registration/fee in (INSERT RACE). Please send me a code so I can register in (INSERT DEFERRAL RACE REQUESTED) for $30.

Please look for an email from us by 9/30 with details.


  • Limited to the first 50 deferral requests. 
  • You can’t defer a second time from the race you deferred to.
  • Deferring will break your Endurance streak. Changing to a Virtual Race will keep your streak going.
  • Deferring will break your Multi-Race Medal qualification. Selecting the virtual option will maintain your eligibility.
  • Charity registrations are not eligible for deferral.

Contact Us


Mailing Address
Fox Valley Marathon
PO Box 3955
St. Charles, IL 60174

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About the Fox Valley Marathon Races

Combining small race atmosphere with big race amenities, the DuPage Medical Group Fox Valley Marathon, Half Marathon, and Fall Final 20 are ideal for both veterans looking for a fast Boston Qualifier 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.

© Copyright 2018 Fox Valley Marathon Races

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