San Antonio Marathon Half Marathon: a flat loop course in San Antonio. Pacing by section, fueling, and race-day tips.
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Plan pacing, fueling, and course strategy for San Antonio Half Marathon using free calculators and GPX elevation analysis.
The San Antonio Marathon half marathon is run by San Antonio Sports and replaced the Rock 'n' Roll San Antonio event after its last race in December 2024. Both the half and the full marathon start and finish at Hemisfair. In 2025 organisers said the courses pass historic landmarks including The Alamo and Fort Sam Houston.
| Fact | Value |
|---|---|
| Location | San Antonio, Texas, USA |
| Distance | 21.1 km (half marathon) |
| Usually held | December |
| Course | flat, loop |
| Typical weather | Five-year average of about 11 °C at the start and 19 °C in the afternoon (52 °F and 67 °F), per HalfRuns |
| Official site | https://www.sanantoniomarathon.com/ |
HalfRuns rates the course ultra-flat. The race site gives no elevation figures, so check the current course map. Run an even pace and plan your fuel around the single gel station.
| Section | Terrain | Advice |
|---|---|---|
| mile 1–4 | Downtown streets near Hemisfair | Start at goal pace or slightly slower while the field spreads. |
| mile 5–10 | City streets past historic landmarks | Hold an even pace and use the water and electrolyte stations. |
| mile 11–13.1 | Return to Hemisfair | Keep steady, then lift the effort over the final mile. |
The race site lists 8 water stations and 4 electrolyte stations, plus 1 gel station on the half marathon course. Carry extra gels if you plan to take more than one.
HalfRuns rates it ultra-flat. The official site gives no elevation figures, so we do not give a number.
Both are at Hemisfair in downtown San Antonio.
It is held on a Sunday in early December, as part of San Antonio Marathon weekend.
Facts checked 2026-10 against the sources below. Race details change from year to year — confirm with the official site before race day.
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