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South Texas International Marathon

Harlingen, TX
Sunday, December 7, 2025

  5 Stars from 1 Reviews

Description

South Texas International Marathon’s (STIM) unique course will take runners through four cities and two counties! This Boston Qualifier marathon will make its start at the “Heart of the Valley”, Donna, Texas. Runners will then cross through historic downtown areas of Weslaco, Mercedes and La Feria. The grand finish line will be at the Mercedes FEMA Dome in Mercedes, Texas..



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Marathon Pace Bands

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Race Information

Race Dates

2025: Sunday, December 7, 2025
2024: Sunday, December 8, 2024


Course Information

Profile: Very Flat
Type: Point to Point
Surface: Road/Pavement

Boston Qualifier?: Yes
World Marathon Major Qualifier?: No


Race Day Weather

Mean Temp.: 64°F (17°C)
Average High: 75°F (23°C)
Average Low: 54° F (12°C)




PR Score & Course Score

PR Score: 97.41
Course Score: 99.82


Race Size

2024: 123 Finishers
2023: 206 Finishers
2022: No Results
2021: No Results
2020: No Results
2019: No Results


BQ Percentages

2024: 8.9%
2023: 8.7%
2022: N/A
2021: N/A
2020: N/A
2019: N/A

Miscellaneous Information

Pace Groups?: No


Weather Averages for Last 2 Years


Race Day Temperatures

High: 70°F  (21°C)
Low: 53°F  (12°C)

Race Start Conditions

54°F  (12°C)
Humidity: 91%

Overcast
NW 3 mph

PR Score

196.81

Course Score

99.82





How does the South Texas International Marathon Rank?


The South Texas International Marathon was the 339th largest marathon in the U.S. last year and was the 231st largest in 2023.

Last year 8.9% of finishers qualified for the Boston Marathon and 8.7% of runners qualified for Boston in 2023.

This gives the South Texas International Marathon the 191st highest percentage of Boston Marathon qualifiers in the U.S. last year and the 223rd highest percentage in 2023.


Its Course Score of 99.82 ranks it as the 45th fastest marathon course in the U.S. and the 2nd fastest course in Texas.

The typical race time temperature and humidity levels are above the ideal range for optimal marathon performance. This, coupled with the Course Score, gives the South Texas International Marathon a PR Score of 97.41. This PR Score ranks it as the 314th fastest marathon in the U.S. and the 20th fastest in Texas.

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


South Texas International Marathon Elevation Chart

Max Elevation: 100 feet (30m)
Min Elevation: 37 feet (11m)

Elevation Gain: 172 feet (52m)
Elevation Loss: 234 feet (71m)


South
Course updated 08/17/2023



Hotel & VRBO Accommodations for the
South Texas International Marathon

View available accomodations around the South Texas International Marathon Finish Line and Course. Book your Reservation now before the best places are sold out.


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How Fast Can You Go?


If you ran the South Texas International Marathon in 5:04:00, what would your time in other marathons be?

See how your race times would compare on other marathon courses with our time conversion tool.




Recent South Texas International Marathon Reviews

5 Stars from 1 Reviews
View all Reviews





RR's review of 2024 South Texas International Marathon.   

5 / 5 Stars

Review

Everything about this marathon S.T.I.M. was great, absolutely no complaints. This was my second year running the marathon race and it continues to get better with each passing year. The course was as advertised, "fast and smooth"! Trafffic control, hydration stations and race swag (medals, shirts, jackets etc.) was all top tier.


Race Tips

Marathon pacers for different finishing goals. Additional porta-pottys at the starting area, course and finishing area would be great as the popularity of S.T.I.M. grows.


Logistical Tips (Hotels, Restaurants, Parking, Discounts, etc.)

Maybe designated parking areas at the start and finishing areas would greatly assist all participants and the general community in the surrounding areas.