Contact Info:
Boston Office (Administration)
185 Dartmouth Street
6th floor
Boston MA 02116
Hopkinton Office (Registration)
One Ash Street
Hopkinton MA 01748

Frequently Asked Questions

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Unfortunately, Boston Marathon bib numbers and entry fees cannot be refunded. Regrettably, we do not allow deferment of race entry to another year. Runner bib numbers cannot be transferred to another participant, and you may not give your number to someone else. The Boston Marathon is a top-level sporting competition, and the B.A.A. seeks to uphold the integrity of both its entrants list and field and the results and awards reports and rankings.

Refunds or deferments of bib numbers for the Boston Marathon will not be granted for any reason, including injury, pregnancy, military exercise or deployment, and family emergencies. We regret that we cannot make exceptions.

For active duty military deployments to war zones, deferment of qualifying times will be honored for a later race. However, there will be no refund or deferment of bib numbers or entry fee. The B.A.A. appreciates the understanding from all who ask this question of the race organization, and we appreciate the cooperation in upholding the policies that are in place.


The 13.1-mile, rolling course is an out-and-back route that runs along the Emerald Necklace park system.

  • The B.A.A. Half Marathon will begin and end at White Stadium in Boston’s Franklin Park. The park, one of the oldest in America, is located in Boston’s Jamaica Plain and Dorchester neighborhoods.
  • With a start on Pierpont Road, the course proceeds out of Franklin Park, over the Monsignor William Casey Overpass, and past the Arnold Arboretum and Jamaica Pond as The Arborway becomes The Jamaicaway.
  • The course then passes Willow Pond and Olmsted Park, before the turn-around-point on The Riverway 4.75 miles into the race.
  • On the return, runners hug the western side of the Emerald Necklace, with Leverett Pond, and Jamaica Pond now on the left.
  • The race re-enters Franklin Park and loops around animal enclosures in the Franklin Park Zoo, before finishing on the track in White Stadium.

For more information, and to view the course map (including an elevation chart), click the button below:


Official Boston Marathon Merchandise will be on sale at the John Hancock Sports & Fitness Expo, several Boston sporting goods stores, in Copley Square Park and at the Family Meeting Area after the race. Before or after race weekend, merchandise may be ordered online or via mail-order directly from our licensees. Some of them may also have limited amounts of previous years’ merchandise available.

John B. Hynes Convention Center
900 Boylston Street
Boston, MA 02115

The John Hancock Sports & Fitness Expo is open to the public and admission is free. The Hynes Convention Center is conveniently located in the center of Boston, in the Back Bay area. For more information about the John Hancock Sports & Fitness Expo, visit the Conventures website.

To see a list of official Boston Marathon licensees and their products go to our Shop page.


The average temperature at the start of the Boston Marathon ranges from 45-50 degrees F. The spread of temperature throughout the race can average approximately 25 degrees F, meaning the finish line temperature can average from 70-75 degrees F. However, in years past, there have been examples of extreme weather at the Boston Marathon. See below for examples:


  • 1907 Traces of sleet
  • 1908 Snowflakes and drizzle
  • 1925 Cold wind and occasional snowflakes
  • 1961 Snow squalls driven by winds of 10–12 mph; recorded temperature was 39 degrees
  • 1967 Snow squalls accompanied the runners through the first five miles.

Driving Rain

  • 1970 Mix of rain and sleet; temperatures in the high 30s;
  • 2007 Rain; winds gusting 25-30 mph; temperatures in the mid 40s.

Extreme Heat or Unseasonable Warmth

  • 1905 The temperature was reported to have reached the 100-degree mark.
  • 1909 The temperature soared to 97 degrees.
  • 1915 Reports of “intense heat.”
  • 1927 With the temperature reaching 84 degrees, a newly surfaced, yet uncured, road melted under the runners’ shoes.
  • 1931 Reports of “terrific heat” that “spelled ruin to the hopes of countless ambitious runners.”
  • 1952 The temperature rose to the upper 80s, with a high of 88 degrees.
  • 1958 The temperature climbed to 84 degrees.
  • 1976 For much of the first half of the race, the temperature along the course was reported to be 96 degrees.
  • 1987 The temperature was in the mid/upper 80s and the humidity was more than 95 percent.
  • 2004 The hottest marathon since 1976 (86 degrees at the finish) caused a record number of heat-related illnesses.
  • 2012 The temperature reached 75 degrees by the start of the Women's Elite field (9:30 a.m.), with a high of 89 degrees reported in Framingham (10K mark) by mid-day.

Entrants in the Boston Marathon who have submitted a time that meets the qualifying standard for their age and gender will be seeded accordingly. Entrants without a qualifying time will be assigned a bib number accordingly.


Official Entrants receive:

  • Admission to the John Hancock Sports & Fitness Expo
  • Long sleeved t-shirt
  • Bib number
  • An official result from an electronically recorded official timing system
  • Runner’s gear check (click here for more information)
  • Boston Marathon Official Program
  • Complimentary ticket for the Pre-Race Pasta Dinner
  • Complimentary transportation to the start
  • Access to the Athletes’ Village in Hopkinton, providing entertainment, light refreshments, Poland Spring water, Gatorade Endurance Formula, ClifBar products, bagels, tenting, and portable toilets.
  • Water and Gatorade Endurance Formula along the course
  • First aid / medical facilities along the course and at the finish area
  • Athlete tracking
  • A finisher’s medal upon finishing the marathon before approximately 5:45 p.m.
  • Baggage and dressing area (no showers)
  • Massage
  • Family meeting area
  • Admission to the Awards Ceremony
  • Complimentary ticket for the Post-Race Party
  • Results postcard providing all 5km split information, official and net times
  • Finisher’s certificate (mailed during the summer)
  • Results book (mailed over the summer)

Timing will conclude 2.5 hours after the last participant crosses the finish line. The course will close at various intervals prior to 11:00 a.m., and participants are then asked to move to the side of the road or continue on the sidewalks where available.


All finishers will receive a specially designed medal before exiting the finish chutes. No finisher’s certificates will be issued on site, but will be mailed to all finishers once all of the results are made official. This process usually is completed by the summer following the race.

Team scoring is based on the combined total net times of: top five finishers in men’s open (may include men over 40), top five finishers in men’s masters (40-over), top three finishers in men’s veterans (50-over), top three finishers in men’s seniors (60-over), and the top three finishers in all women’s divisions. Only one team per club will be scored in each division. Clubs must be current members of USATF or RRCA.
B.A.A. Moment 1

1920 - Ashland Start

The Boston Marathon began in Ashland, Massachusetts from 1897 through 1923 then moved to Hopkinton for the 1924 race. The course was lengthened to 26 miles, 385 yards to conform to the Olympic standard, and the starting line was moved west from Ashland to Hopkinton. Since then, the race has started in Hopkinton every year.