Childish Nonsense

APR
25
2026
Childish Nonsense is a playful trail race each late April at Deer Grove Forest Preserve West in Palatine, Illinois. Distances from 10K to 50 mile cover rolling crushed gravel loops with a friendly community vibe and plenty of shenanigans.
Sat 25 Apr 2026
50 miles 50 kilometers 25 kilometers 10 kilometers

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Event details

Childish Nonsense is a trail race held in late April at Deer Grove Forest Preserve West in Palatine, Illinois. The event is organized by CUSS Running (Curious Ultrarunner's Secret Society). Registration closes on Mar 15 at 11:59 PM CT.

Distances offered

  • 10K
  • 25K
  • 50K
  • 50-mile

Course and format

The course is made up of soft crushed gravel loops on mostly wide paths with little technical terrain. Runners complete multiple laps: the 10K is one lap plus extra, the 25K is three laps, the 50K is six laps, and the 50-mile is nine laps. One aid station is located at the start/finish and is encountered about every 5.5 miles. There are no designated crew access areas on the course apart from the start/finish. 50-mile entrants may use a pacer after four loops. A single cutoff time of 8:00 PM applies to all distances. The event schedule includes informal activities described as shenanigans during the day.

The organizer offers a number of free entries for BIPOC and LGBTQ+ athletes and accepts each entrant’s declared gender for registration; non-binary entrants can request record updates from the organizer. Visit the organization's website for the most recent information.

50 mi
50 Miler
50 km
50k
25 km
25k
10 km
10k