Boston, MA
Monday, April 19, 2027




4.8 Stars from 50 ReviewsThe Boston Marathon is a historic point-to-point road race that follows a net-downhill but challenging route through eight Massachusetts cities and towns. While the course features a total elevation drop of 459 feet, it is widely considered one of the most difficult major marathons due to its quad-punishing opening descents and a series of late-race climbs.
The race begins in Hopkinton and travels northeast toward the finish line on Boylston Street in Boston. The terrain is entirely paved asphalt, primarily following Route 135 and Route 16. The layout is relatively straight for the first 25 miles, with only one turn (at the Newton fire station) until the famous "Right on Hereford, Left on Boylston" sequence in the final half-mile.
The elevation profile is characterized by extreme undulation, divided into three distinct phases:
Because of the net-downhill drop, the Boston Marathon is not eligible for World Records, and its PR potential is heavily dependent on the wind and weather. A strong tailwind from the west can lead to fast times, while a headwind off the Atlantic can make it significantly harder. PR attempts often fall apart in the Newton Hills if a runner does not conserve energy during the opening downhill miles. It is a course that best suits tactical runners who can manage their pace early to survive the late-stage climbs and the final descent into the city.
Don't waste months of training only to run the wrong pace.
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Race Dates
2027: Monday, April 19, 2027Course Information
Profile: DownhillRace Day Weather
Mean Temp.: 53°F (11°C)PR Score & Course Score
PR Score: 99.21Race Size
2026: 29,025 FinishersBQ Percentages
2026: 53.5%Miscellaneous Information
Pace Groups?: No
Race Day Temperatures |
High: 62°F (17°C) |
Race Start Conditions |
53°F (12°C) |
PR Score |
99.08 |
Course Score |
99.62 |
The Boston Marathon was the 4th largest marathon in the U.S. last year and was the 3rd largest in 2024.
This year 53.5% of finishers qualified for the Boston Marathon and 45% of runners qualified for Boston in 2025.
This gives the Boston Marathon the 12th highest percentage of Boston Marathon qualifiers in the U.S. last year and the 4th highest percentage so far in 2026.
Its Course Score of 99.21 ranks it as the 181st fastest marathon course in the U.S. and the 6th fastest course in Massachusetts.
The typical race time temperature and humidity levels are within the ideal range for optimal marathon performance. This, coupled with the Course Score, gives the Boston Marathon a PR Score of 99.21. This PR Score ranks it as the 130th fastest marathon in the U.S. and the 5th fastest in Massachusetts.
Learn more about PR Scores and Course Scores on the FAQ page.
Max Elevation: 470 feet (143m)
Min Elevation: 10 feet (3m)
Elevation Gain: 815 feet (248m)
Elevation Loss: 1275 feet (388m)
View available accomodations around the Boston Marathon Finish Line and Course. Book your Reservation now before the best places are sold out.
For a better mobile or desktop experience:
Use tools below to compare races and convert times across courses.
Do you want to see how the Boston Marathon stacks up against other marathons?
Compare the details of the Boston Marathon side-by-side with other marathons with our Comparison Tool.
If you ran the Boston Marathon in 4:35:00, what would your time in other marathons be?
See how your finish time would compare on other marathon courses with our Time Conversion Tool.




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