San Antonio Marathon
Antonio, United States of America · Sunday 6 December 2026
The San Antonio Marathon is held in the center of San Antonio, Texas, with both the marathon and half marathon starting and finishing at Hemisfair, a prominent park in downtown. The full marathon distance is 26.2 miles (42 km), and the course weaves through several historic neighborhoods, including King William, North Saint Mary's Street, Monte Vista, Olmos Park, and Alamo Heights.
Difficulty Calculator
h
:m
:s
Adjusted Time
4:09:35
Time difference: +9.6 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain277m
Elevation High248m
Elevation Low190m
Weather Forecast
High24°C
Low11°C
Chance of Rain0%
How hard is San Antonio Marathon?
Difficultharder than 68% of marathons
Flattest / easiestHardest
On our difficulty model, San Antonio Marathon plays about 11 minutes slower than an average road marathon for a 3:30 runner. It ranks #366 hardest of 1150 marathons we analyse, and #187 of 575 in United States of America. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at San Antonio Marathon?
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On San Antonio Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:03:34 | +03:34 |
| 3:30:00 | 3:36:26 | +06:26 |
| 4:00:00 | 4:09:35 | +09:35 |
| 4:30:00 | 4:43:00 | +13:00 |
| 5:00:00 | 5:16:40 | +16:40 |
| 5:30:00 | 5:50:34 | +20:34 |
| 6:00:00 | 6:24:42 | +24:42 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
San Antonio Marathon 2026 Course Analysis
San Antonio Marathon is a full marathon held in Antonio, United States of America. It is scheduled for Sunday 6 December 2026. The course is run on road surface with 277m of total climbing, with its high point near 248m above sea level. For registration and full race details, visit the official San Antonio Marathon website.
Elevation Profile
With 277m of total climbing, this is a gently undulating course. The elevation changes are manageable for most runners and shouldn't greatly affect your pacing.
Expected Race Day Weather
Based on historical weather data for December, the expected race day conditions are as follows. Moderate temperatures between 11°C and 24°C are expected. While comfortable for most runners, those targeting fast times should pay attention to hydration, as these temperatures can impact performance on race day. There is a low chance of rain (0%), so dry conditions are likely.
Surface Type: Road
San Antonio Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare San Antonio Marathon against other marathons to find the right race for your goals.
Marathons of similar difficulty
If San Antonio Marathon fits your goal, these courses play out about the same on our difficulty model.
Other Marathons in United States of America
Deseret News Marathon
Salt Lake City, United States of America
Road145m gainJuly 2026
Run Sunset Beach
Sunset Beach, United States of America
Road109m gainJuly 2026
Run the Pier Marathon
Manistee, United States of America
Road0m gainJuly 2026
Grand Island Trail Marathon
Munising, United States of America
Trail0m gainJuly 2026
Aspen Valley Marathon
Aspen, United States of America
Road48m gainJuly 2026