Running
Marathon
42.2 km

Running
Marathon
42.2 km
Running
Half-Marathon
21.1 km
The Boston Marathon is one of the world's premier marathon events, annually held in April, and is run over 42.195 kilometers (26.2 miles).
Yes, water and electrolyte drinks are available on course.
We offer pacers for the Boston Marathon, starting at 2:30 hours and going up to 8:00 hours. Pacers will run with you for the entire duration.
Monthly averages based on historical data (2000–present).
Last updated: Jun 10, 2026, 02:22:50 AM
We'll email you when races match your filters. No spam — only what fits your goals.
Spotted wrong or missing data? Report a bug and we'll look into it.
On your marks
Loading race details…