South Texas International Marathon

Donna, TX, USADecember 7, 2025
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partly-cloudy-day Partly cloudy throughout the day.

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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. Source

Area Map

Course Maps

FAQ

When is the 2025 South Texas International Marathon?

The 2025 South Texas International Marathon will be held on Sunday December 7, 2025.

Is the South Texas International Marathon a Boston Marathon Qualfier?

Yes, the South Texas International Marathon is an official Boston Marathon qualifier.

What is the time limit for the South Texas International Marathon?

The time limit for the South Texas International Marathon is 6.5 hours.

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Historical Weather

RunScore
Run Score: 8
Temp
69°F
Min/Max
56°/69°F
Dew
59°F
Days of Rain
0/2
Wind
8mph
Tap a row for details.
YearConditionsLow / HighRainRunScore
2024
cloudy
51°/ 62°-
Run Score: 9
2023
partly-cloudy-night
61°/ 76°-
Run Score: 8