BestRaces| Distances | Marathon |
| Surface | road |
| Field size | 29,025 runners |
| Founded | 1897 (129 years) |
| Elevation gain | 810 ft |
| USATF certified | Yes |
| Boston qualifier | Yes |
Researched from the race's own site and published results, last updated October 4, 2026.
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Where it runs
The course for Boston Marathon, drawn from the route its organizer or the public map record provides.
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Course lines are simplified for the web — run the official route, not this one.
Race-day weather
What the weather did on or around April 19 in each of the last 5 years, measured at Walpole, 14.7 miles from Boston.
| Year | High | Low | Rain |
|---|---|---|---|
| 2026 | 51°F | 39°F | none |
| 2025 | 83°F | 54°F | none |
| 2024 | 63°F | 41°F | 0.26 in |
| 2023 | 52°F | 41°F | none |
| 2022 | 57°F | 42°F | 1.27 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.
You'll be staying with other racers
That's about 461 runners for every hotel, motel and guest house within 15 miles of the race. Race weekend goes to whoever books first.
Lodging count from OpenStreetMap, within 15 miles of the race start we have on file.
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 Boston 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
- Marathon
- 810 ft of climbing · Rolling
- ≈44°F on April 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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Beta. The splits are exact math on your goal time. The terrain and weather notes are estimates from this race's listing, not a forecast.
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