Des Plaines River Trail 50K
Race Day Weather
Comfortable temps, big temp swing, moderate wind
Mild 59°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 79°F by later miles, so expect fading conditions as the race progresses. Moderate winds around 16mph may affect pacing on open sections of the course.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Des Plaines River Trail 50K
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The 50K starts and finishes at Half Day Forest Preserve in Vernon Hills, Illinois, and runs out-and-back stretches of the Des Plaines River Trail through the Lake County forest preserves. The trail is flat, wide crushed limestone with no roots or rocks, running through forest and open wetland, and it has only four minor road crossings because bridges and viaducts carry the major roads. It is the second ultra on the Saturday schedule, run alongside the 50 Mile and the marathon.
