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Prairie State Marathon

Libertyville, IL

Race Dates

2017: TBD
2016: Saturday, October 8, 2016

Course Information

Profile: Mostly Flat
Type: Out and Back
Surface: Mostly on Trails
Certified?: Yes

Race Day Weather

Mean Temp.: 56°F (13°C)
Average High: 67°F (19°C)
Average Low: 45° F (7°C)

Historical Weather

PR Score & Course Score

PR Score: 99.09
Course Score: 99.24

Race Size

2016: No Results
2015: 238 Finishers
2014: 270 Finishers

BQ Percentages

2016: N/A
2015: 8%
2014: 8.5%

Miscellaneous Information

Pace Groups?: No

Marathon Pace Bands

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Course Description

The Prairie State Marathon course starts in Independence Grove Forest Preserve before traveling onto crushed limestone paths through and by northern Illinois prairie, forests, rivers and lakes. All courses will be USATF certified. The course is fairly flat with portions of moderate hills.

The course surface is approximately 4 miles on paved roads and the rest of the 22+ miles on crusted limestone paths.

Marathon Rankings

The Prairie State Marathon was the 256th largest marathon in the U.S. last year and was the 241st largest in 2014.

Last year 8% of finishers qualified for the Boston Marathon and 8.5% of runners qualified for Boston in 2014.

This gives the Prairie State Marathon the 264th highest percentage of Boston Marathon qualifiers in the U.S. last year and the 246th highest percentage in 2014.

Its Course Score of 99.24 ranks it as the 137th fastest marathon course in the U.S. and the 2nd fastest course in Illinois.

The typical race time temperature and humidity levels are slightly above the ideal range for optimal marathon performance. This, coupled with the Course Score, gives the Prairie State Marathon a PR Score of 99.09. This PR Score ranks it as the 117th fastest marathon in the U.S. and the 3rd fastest in Illinois.

Learn more about PR Scores and Course Scores on the FAQ page.

Elevation Chart

Max Elevation: 705 feet (214m)
Min Elevation: 649 feet (197m)


Ratings & Reviews: None

Finish Time Equivalent

If you ran the Prairie State Marathon in 4:36:00, what would your time in the Boston Marathon be?

See how your race times would compare on other marathon courses using the Marathon Time Converter Tool.