- Weather
- 54°Ftypical startModelled estimate
- Field size
- ~2,000 runners
- Course
- Rolling
- Elevation
- 400 ft gain
Alamo and River Walk corridor
PR7Weather9Experience8
Early December · Southwest · Loop
2026 San Antonio Marathon
San Antonio, TX · Friday, December 4, 2026
Event: 2026 - Marathon
Registration opens on the organizer's site
Typical start
54°
Cooler than 22% of U.S. marathons
Modeled historical conditions
Elevation gain
400ft
Flatter than 38% of races
Estimated total climb
Field size
2K
Larger than 71% of races
Estimated field
PR potential
7.2/10
Ahead of 27% of races
Almanac model
Percentiles compare this race against all 224 U.S. marathons in the Almanac.
Course profile
400 ft gain · 0 ft net
Rolling course, loop.
0510152026.2
Race-day weather
Modeled from location, month and coastal proximity, not verified race history.
6 AM
46°
Start
54°
Midday
65°
ExcellentGoodWarmHeat risk
Typical start sits at 54°F, good conditions.
Typical dew point 42°F, 16% chance of precipitation, wind around 7 mph. All modeled.
The bottom line
A balanced race that suits most goals without specialising in any.
2026 San Antonio Marathon is a strong choice for a first marathon, and the course rolls gently without any sustained climbing. The tradeoff is that nothing about it is extreme in either direction.
Why runners choose this race
A loop course around San Antonio, TX, with steady rollers that reward even pacing.
The case for it
- Not enough verified data yet.
The tradeoffs
- No notable warnings in the data.
Course and logistics
- Course type
- Loop
- Surface
- Road
- Profile
- Rolling
- Total gain
- 400 ft(estimated)
- Total loss
- 400 ft(estimated)
- Net elevation
- 0 ft(estimated)
- Field size
- ~2,000 runners(estimated)
- Crowd support
- Pockets of spectators
- Entry
- Easy
- Entry fee
- $119(most recent listed price)
- Day of week
- Friday
- Start / finish
- Start and finish in the same area
Race details
- Typical timing
- Early December
- Next confirmed date
- Friday, December 4, 2026
- Registration
- Open now
- Region
- Southwest
- Editorial tier
- Recommended
- Data last reviewed
- 2026-08-26
- Loop course
- Easy entry
Similar races
Races with a comparable profile.
- Weather
- 52°Ftypical startModelled estimate
- Field size
- ~2,500 runners
- Course
- Rolling
- Elevation
- 500 ft gain
"Run to Remember" memorial tribute
PR7Weather9Experience8
- Weather
- 48°Ftypical startModelled estimate
- Field size
- ~1,500 runners
- Course
- Rolling
- Elevation
- 700 ft gain
"Center of the Universe" detour option
PR7Weather9Experience7