Runners will face temperatures starting at 60°F, rising to 79°F by race end. Winds will be from the SSW at 16 mph, presenting a headwind for parts of the course. With humidity at 47%, hydration will be key; runners should plan to adjust their pacing strategy, especially in the latter stages.

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Distance: 26.2mi

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Race Info

The Des Plaines River Trail Marathon takes place each October in Lake County, Illinois, offering marathon, half marathon, 50K, and 50 mile distances on the Des Plaines River Trail. The route is a flat, crushed gravel trail through forest preserves and wetlands, with road crossings handled by bridges or viaducts. The marathon is a Boston Marathon qualifier. All distances start and finish at Half Day Forest Preserve near Lincolnshire/Vernon Hills, Illinois. Source

Website

Race weekend

Saturday, October 10

7:00 AM50M (50.0 mi)7:05 AM50K (31.1 mi)

8:00 AMMarathon (26.2 mi)

9:00 AMHalf Marathon (13.1 mi)

Course Map

FAQ

When is the 2026 Des Plaines River Trail Marathon?

The 2026 Des Plaines River Trail Marathon will be held on Saturday October 10, 2026.

Is the Des Plaines River Trail Marathon a Boston Marathon Qualifier?

Yes, the Des Plaines River Trail Marathon is an official Boston Marathon qualifier.

What is the time limit for the Des Plaines River Trail Marathon?

The time limit for the Des Plaines River Trail Marathon is 10.5 hours.

What will the weather be like for the 2026 Des Plaines River Trail Marathon?

The forecast calls for a high of 79°F and a low of 58°F with a 0% chance of rain.

Historical Weather

Based on 16 years of data

Avg Temp

53°F

L:47° H:58°

RunScore

Conditions

Rain Freq

19%

3 of 16 yrs

Wind9mph

Dew42°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Des Plaines River Trail Marathon Becoming cloudy in the afternoon. 2026	60°/77°	-	50°
2025 Des Plaines River Trail Marathon Partly cloudy throughout the day. 2025	50°/64°	-	49°
2024 Des Plaines River Trail Marathon Becoming cloudy in the afternoon with late afternoon rain. 2024	60°/64°	-	50°
2023 Des Plaines River Trail Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2023	51°/53°	Light	49°
2022 Des Plaines River Trail Marathon Clear conditions throughout the day. 2022	36°/49°	-	33°
2021 Des Plaines River Trail Marathon Clear conditions throughout the day. 2021	45°/63°	-	36°
2019 Des Plaines River Trail Marathon Partly cloudy throughout the day. 2019	38°/47°	-	24°
2018 Des Plaines River Trail Marathon Clear conditions throughout the day. 2018	34°/48°	-	31°
2017 Des Plaines River Trail Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2017	62°/63°	Light	62°
2016 Des Plaines River Trail Marathon Partly cloudy throughout the day. 2016	56°/63°	-	57°
2015 Des Plaines River Trail Marathon Clear conditions throughout the day. 2015	33°/46°	-	23°
2014 Des Plaines River Trail Marathon Partly cloudy throughout the day with morning rain. 2014	46°/48°	Light	39°
2013 Des Plaines River Trail Marathon Partly cloudy throughout the day with rain. 2013	44°/53°	-	35°
2012 Des Plaines River Trail Marathon Partly cloudy throughout the day. 2012	42°/57°	-	41°
2011 Des Plaines River Trail Marathon Clear conditions throughout the day. 2011	38°/61°	-	36°
2010 Des Plaines River Trail Marathon Partly cloudy throughout the day. 2010	60°/66°	-	59°