Boston Fall Races 2025: The Best 5Ks, 10Ks, and Half Marathons This Season

Fall in Boston means crisp mornings, colorful foliage, and some of the best running weather of the year. Whether you’re looking for a casual 5K, a challenging half marathon, or something in between, the city has plenty of races lined up this season. Lace up and mark your calendars, here are the races you won’t want to miss!

Pictured: Esplanade 5k Run & Walk

5K Races in Boston This Fall

Fall Classic 5K – Sunday, October 5 @ 9:30am (Cambridge)

Kick off your fall racing season with this fast and festive 5K in Cambridge. Learn more.

Autism Speaks Walk and Run – Sunday, October 12 @ 9:45am (Boston Common)

A meaningful run through the heart of the city, supporting an important cause. Learn more.

Run for Beer: Long Live Roxbury – Saturday, October 25 @ 12pm (Roxbury)

Part of the Brewery Running Series, this fun run pairs fitness with craft beer. Learn more.

Esplanade 5K – Sunday, October 26 @ 9:30am (Boston Esplanade)

Enjoy scenic views along the Charles River in this fall favorite. Learn more.

Boston River Run – Sunday, November 9 @ 9:30am (Charles River)

Run in memory of Corporal Andrew Graham Narcus while supporting the Andrew Graham Semper Fi Fund. Learn more.

Fenway Spartan Race – Saturday & Sunday, November 8–9 (Fenway Park)

Not your average 5K, this stadium sprint takes you through Fenway with obstacles at every turn. Learn more.

2025 Turkey Trot with Boston Road Runners - Saturday, November 22 (Cambridge) A fun Gobble Gobble 5K run around the Charles River. Learn more. Franklin Park Turkey Trot – Thursday, November 27 @ 9am (Thanksgiving Day, Franklin Park)

A Boston tradition! Start your holiday with a family-friendly run through Franklin Park. Learn more.

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10K Races

Boston 10K for Women – Saturday, October 11 @ 9am (Boston Common)

One of the largest women’s running events in New England, this iconic race celebrates strength, community, and tradition. Learn more.

Boston Firefighters Memorial 10K – Sunday, October 12 @ 9am (Dorchester)

A moving tribute race honoring fallen Boston firefighters. Learn more.

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Half Marathons

Cambridge Half Marathon – Sunday, November 2 @ 7am (Cambridge)

Flat, fast, and scenic, this popular half marathon draws runners from across New England. Learn more.

BAA Boston Half Marathon – Sunday, November 9 @ 8am (Franklin Park)

One of Boston’s premier fall races, this challenging but rewarding course winds through beautiful Franklin Park. Learn more.

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Why Run a Fall Race in Boston?

Boston in the fall is hard to beat. The cool weather is perfect for racing, and the city’s parks, river paths, and historic streets make for stunning race courses. Plus, the sense of community is strong, whether you’re racing for a cause, chasing a personal best, or soaking in the festive atmosphere with friends. So grab your running shoes, sign up for a race, and experience Boston at its best this fall one stride at a time.