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Childish Nonsense 10K/25K/50 Miler – Chicago Ultra Marathon

June 5 @ 7:00 am - 7:00 pm

chicago ultra marathon

Chicago Ultra Marathon

Start: 7 am
When: Saturday , June 5th 2021
Where: Deer Grove Forest Preserve

Childish Nonsense will be a loop course highlighting the rolling trails of the Deer Grove Forest Preserve. Most of the trail is a wide dirt path, with nothing too technical to worry about. The 50 miler will be a Chicago Ultra Marathon built to delight both the seasoned ultra runner and the brand new ultra runner.

10k Runners will do one lap.
25k Runners will do 2.5 laps.
50 milers will do 8 laps.

There will be one aid station at the Start/Finish. You can have your own aid station and crew set up at that area.

50 milers can have a pacer after 4 loops.

There will be shenanigans occurring throughout the day to help us all awaken our inner child.

Join the Curious Ultrarunner’s Secret Society for a fun day in the woods. Be sure to join the Facebook Group to get in on the  Chicago Ultra Marathon challenges leading up to the race.

Curious Ultrarunner’s Secret Society was established to inject a sense of whimsy into training calendars, split times, and fartleks. Our goal is to build a community that creates a space for the individual to fall in love with the magic of running.


To help others fall in love with ultrarunning.


To make you & the world slightly better through laughter & pain.


June 5
7:00 am - 7:00 pm
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Deer Grove Forest Preserve
W. Dundee Rd.
Palatine, IL United States
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