BestRacesroad · Half marathon · 25K · 5K · and 2 more
American Hero 25K Relay & Half Marathon
Build your free race-day pace plan| Distances | Half marathon, 25K, 5K, Kids fun run, 10K |
| Surface | road |
| Field size | 34 runners |
| USATF certified | No |
| Boston qualifier | No |
From the race's RunSignup listing, with field size from its posted results, last updated September 23, 2026.
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Race-day weather
What the weather did on May 23 in each of the last 5 years, measured at San Antonio International Airport, 5.6 miles from San Antonio.
| Year | High | Low | Rain |
|---|---|---|---|
| 2026 | 85°F | 65°F | 0.20 in |
| 2025 | 95°F | 68°F | 0.31 in |
| 2024 | 96°F | 79°F | none |
| 2023 | 89°F | 69°F | none |
| 2022 | 87°F | 69°F | 0.01 in |
Daily highs and lows, not start-line temperatures: most races start in the cool of the morning, closer to the low. Source: NOAA National Centers for Environmental Information, GHCN-Daily.
Stay near San Antonio
Hotels and rentals in and around San Antonio, TX.
Preset to race weekend, May 22 – 24.
Bookings made through this map may earn BestRaces a commission. It has no effect on rankings (how ranking works).
Race Pace Analyzer beta
Build your American Hero 25K Relay & Half Marathon splits
This one already knows the course. Give it your goal time and it gives you every split to the finish, adjusted for this race's terrain and its usual race-morning temperature, plus a fueling plan and a check on whether the goal fits your fitness. It's free, and there's nothing to sign up for.
- Already loaded
- 4 distances
- ≈67°F on May race mornings
| Mile | Split | Elapsed |
|---|
Training paces for this goal
The everyday paces that build the fitness behind your goal, worked out from your target with the Daniels VDOT model. Save these for your next training block.
Treat these as a guide. Run easy days by feel, and adjust for heat, hills and how your legs feel that day.
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