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River Rat Marathon

Yankton, SD

Race Dates

2018: TBD
2017: Saturday, April 22, 2017

Course Information

Profile: Rolling Hills
Type: Mostly Loop
Surface: Road/Pavement
Certified?: Yes

Race Day Weather

Mean Temp.: 41°F (5°C)
Average High: 63°F (17°C)
Average Low: 38° F (3°C)

Historical Weather

PR Score & Course Score

PR Score: 98.60
Course Score: 98.60

Race Size

2017: No Results
2016: 59 Finishers
2015: 40 Finishers

BQ Percentages

2017: N/A
2016: 1.7%
2015: 5%

Miscellaneous Information

Pace Groups?: No

Race Day Weather Forecast

Race Day Temperatures High: 0°F  (-18°C)
Low: 0°F  (-18°C)

Race Start Conditions

0°F  (-18°C)

 0 mph 

PR Score
(Normal Score)


Course Score


The typical race time temperature and humidity levels are within the ideal range for optimal marathon performance.
Go for it!!!

Course Description

The slightly rolling River Rat Marathon starts at Riverside Park in Yankton and travels out onto the trails to the Lewis & Clark Lake campgrounds. The course then goes around Lake Yankton and back to the Riverside Park for the finish.

Marathon Rankings

The River Rat Marathon was the 521st largest marathon in the U.S. last year and was the 562nd largest in 2015.

Last year 1.7% of finishers qualified for the Boston Marathon and 5% of runners qualified for Boston in 2015.

This gives the River Rat Marathon the 474th highest percentage of Boston Marathon qualifiers in the U.S. last year and the 370th highest percentage in 2015.

Its Course Score of 98.60 ranks it as the 241st fastest marathon course in the U.S. and the 4th fastest course in South Dakota.

The typical race time temperature and humidity levels are within the ideal range for optimal marathon performance. This, coupled with the Course Score, gives the River Rat Marathon a PR Score of 98.60. This PR Score ranks it as the 186th fastest marathon in the U.S. and the 2nd fastest in South Dakota.

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

Elevation Chart

Max Elevation: 1288 feet (392m)
Min Elevation: 1163 feet (354m)


Ratings & Reviews: None

Finish Time Equivalent

If you ran the River Rat Marathon in 2:49:00, 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.