Des Plaines River Trail Races

Lake County, United States • 11 Oct 2025

Event details

The Des Plaines River Trail Races take place on October 11, 2025, in Lake County, Illinois, with start and finish at Half Day Forest Preserve. The event offers multiple distances and is organized as a set of out-and-back races on the northern segment of the Des Plaines River Trail. Registration opens January 1, 2025 at 10:00 am Central and closes October 1, 2025 at 11:59 pm CT.

  • Half Marathon
  • Marathon (Boston Qualifier)
  • 50 Km
  • 50 Mile

Course and logistics

The course is almost entirely on trail, using a flat, wide, crushed gravel surface that is free of roots and rocks. The route passes through alternating forests and open wetlands. Major road crossings use bridges or viaducts; minor road crossings total 0 for the half marathon, 2 for the marathon, and 4 for the 50K/50M course. The race may use an alternate course if sections are flooded.

Age minimums are 12 for the half marathon and 16 for marathon, 50K, and 50 mile. Cutoff limits are published per distance and the overall course closes at 6:30 pm. Aid station counts by distance are provided; the event is cup-less, so participants must carry a cup, bottle, or hydration pack. Finisher medals are awarded for every distance and awards are given to overall and age-group winners. T-shirt availability is tied to registration timing. Deferred entries and transfers are allowed under specified deadlines and fees. Visit the organization's website for the most recent information.

Race information

50 mi
50 Mile
50 km
50k
42 km
Marathon
21 km
1/2 Marathon
Visit the organization's website for the most recent information.
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