Paleozoic Trail Runs - Cambrian Fall III
November 8th 2025
Willow Springs, IL
Journey back in time to this rollicking run along forested, unpaved paths of our Palos / Sag Valley Trail Systems within the Cook County Forest Preserve - Regions 6 / 7. We've charted a stimulating course that's sure to satisfy your primordial instinct to "go long." Are you up to the challenge? Choose your distance wisely... take your training seriously... then come race day, it's "finish or fossilize!"
Please join us for our thirteenth annual fall version of Paleozoic Trail Runs, Saturday November 8, 2025.
Additional Distances
This event also has the following sub ultra distances
25 KM