Spring and Fall Ultra Marathons on Chicago's Lakefront

21st Annual Chicago Lakefront 50K
George Cheung Memorial Race

Saturday, March 28, 2020, 8:00 AM

Due to COVID-19 we regretfully must cancel the spring race. Entrants please watch your email for additional information.  You may also contact with any questions.

We hope you will join us for the Fall Lakefront 50/50 on Saturday, October 31. Until then please stay safe.


The race starts and finishes on Chicago's lakefront, at Jackson Park Grove 19A, approximately 100 yards west of the 63rd Street Beach House.


8:00 a.m.  Eight hour time limit. Early Start option is available.


Consists of 3 out-and-back segments.  The race follows the Lakefront running path.  Mostly gravel with some asphalt sections.  One of the flattest 50k’s in North America.
Recognition for Individual and Course Record Performances If you are planning to set a record at this Event that you want to be recognized by USATF, you must contact us as early as possible before registering for the Event to inform us of your intentions, and to discuss the USATF's requirements for recognition of your achievement.


Medals to all finishers. Overall male and female trophies.

Cool Tech Shirt

To every paid participant.

Aid Stations

Three; approximately every 2.5 miles.  Amply stocked with water, Tailwind (Mandarin Orange flavor), Coke, and a variety of food items.  Note that Tailwind is a total fuel source with 200 calories/24 oz with a full complement of electrolytes.


Available online!
Registration Verification Here.


January 1 - 31: $50 (Early Bird Special)
February 1 - 15:  $55
February 16 - March 8: $60
March 9 - 27: $70
Race day registration will no longer be available.  You must pre-register before race day by March 27th at 4:00PM.

Early Start Early starts are available to any runner who wants to do so but you will not officially be in the competition (overall or age group). 

The way it works is to see Pat Onines (Co-Race Director) first on race day.  He will add you to the early start list.  He will also mark the bottom of your bib # with an “ES”.  You may then start whenever you wish and time yourself.  You’ll be responsible to know the course especially where the turn around is.  When you finish, you’ll get a medal and a “Finished” in the official results with no time.

Be sure to let the finish line crew know you were an early starter to avoid any confusion with those being timed.  They will take the bottom of your bib # and give it to Pat as evidence of your finish. 

Please remember that early starters or those that finish after the race time limit will have a “Finished” in the results but will not receive a position or a time.

More Information

Chicago Ultra Marathon
20 Jonathan
Lake Zurich IL 60047
Phone: 847-648-8843

Volunteer Information

Please send an e-mail to with your contact information, and include Chicago Lakefront 50K in your subject line.  Thank you!