This event is free to register. We will just have a donation jar on race day to accept whatever amount ($1-$5) you can spare for the maintenance of the trails that will go to the park.  

It’s a fatass, but not in the most strict sense of the word. Is it a race? Not, if you expect participation medals, race swag in your bag, or timing mats. What we will have for this event is a well-marked 4.5-ish mile looped course on trails in Jacobsburg State Park, one Aid Station, bibs to designate runners, manual but official loop counting, official race start and finish time, and a whole lot of fun with fellow runners.

This is an event perfect for those who are trying to fine tune their long distance race fueling and strategy; those who need a training race; those gearing up for another timed, looped event; or those who just want to see how far their legs can carry them before they fall off. The course is on fairly easy trails but are not completely flat. Each loop has 413 ft of elevation gain, so do not expect to get your mountain running training out of this event, but do not expect to run your PR times here either. There’s just a bunch of bunny hills.


Date Finishers Top Result (M) Top Result (F)
06/29/19 12 36 31.5
07/07/18 22 31.5 31.5
07/22/17 9 36 27
Date Finishers Top Result (M) Top Result (F)
06/29/19 38 58.5 54
07/07/18 37 67.5 58.5
07/22/17 16 63 58.5
We try to keep the most accurate information about this race, but changes do happen. Always visit the official race website for the most up to date information. If you see an error, please let us know

Kettle Moraine 100 Endurance Runs

  • Jun 11, 2022
  • La Grange, WI
50 KM 38 Miles 100 KM 100 Miles