Running races in or near Marlborough, MA
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Marlborough, MA area. Races listed here include both walking and running events of various distances — from 1-milers, to 5Ks, to marathons, and everything else in between.
Running-5K - Individual Age group/open
Organization: The Next Loop Endurance Series
Date of Race: 04-11-2026
Description: What Is The Next Loop? TheNext Loop Endurance Seriesis a loop-based ...
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Running-50K - Individual Age group/open
Organization: The Next Loop Endurance Series
Date of Race: 04-11-2026
Description: What Is The Next Loop? TheNext Loop Endurance Seriesis a loop-based ...
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Running-Marathon - Individual Age group/open
Organization: The Next Loop Endurance Series
Date of Race: 04-11-2026
Description: What Is The Next Loop? TheNext Loop Endurance Seriesis a loop-based ...
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Running-10K - Individual Age group/open
Organization: The Next Loop Endurance Series
Date of Race: 04-11-2026
Description: What Is The Next Loop? TheNext Loop Endurance Seriesis a loop-based ...
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Running-15K - Individual Age group/open
Organization: The Next Loop Endurance Series
Date of Race: 04-11-2026
Description: What Is The Next Loop? TheNext Loop Endurance Seriesis a loop-based ...
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Running-5K - 19 Years Old and Under
Organization: Tri-Valley Front Runners
Date of Race: 05-31-2026
Description: 2026 Westborough Rotary’s5KRun and ...
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Running-Half marathon - Individual Age group/open
Organization: The Next Loop Endurance Series
Date of Race: 04-11-2026
Description: What Is The Next Loop? TheNext Loop Endurance Seriesis a loop-based ...
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Running-5K - 20 Years Old and Above
Organization: Tri-Valley Front Runners
Date of Race: 05-31-2026
Description: 2026 Westborough Rotary’s5KRun and ...
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Rotary Club of Westborough 5K
Organization: Tri-Valley Front Runners
Date of Race: 05-31-2026
Description: 2026 Westborough Rotary’s5KRun and ...
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Running-Kid's Dash - 1 Kid (Age 12 and ...
Organization: Tri-Valley Front Runners
Date of Race: 05-31-2026
Description: 2026 Westborough Rotary’s5KRun and ...
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Running-5K (22 years old and above) - Individual ...
Organization: Tri-Valley Front Runners
Date of Race: 05-09-2026
Description: Course Details: Consists of long ...
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Running-5K (21 years old and under) - 21 ...
Organization: Tri-Valley Front Runners
Date of Race: 05-09-2026
Description: Course Details: Consists of long ...
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Running-Kid's Dash - 2 or more Kids (Age ...
Organization: Tri-Valley Front Runners
Date of Race: 05-31-2026
Description: 2026 Westborough Rotary’s5KRun and ...
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16th Annual Hopedale Blue Raider 5K Run
Organization: Tri-Valley Front Runners
Date of Race: 05-09-2026
Description: Course Details: Consists of long ...
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The Next Loop Endurance Series - New England
Organization: The Next Loop Endurance Series
Date of Race: 04-11-2026
Description: What Is The Next Loop? TheNext Loop Endurance Seriesis a loop-based ...
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Running-5K - 20 Yrs Old and Above plus ...
Organization: Tri-Valley Front Runners
Date of Race: 05-31-2026
Description: 2026 Westborough Rotary’s5KRun and ...
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Running-5K - 20 Yrs Old and Above plus ...
Organization: Tri-Valley Front Runners
Date of Race: 05-31-2026
Description: 2026 Westborough Rotary’s5KRun and ...
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BSS Spring 2026 After School Program
Organization: Coach Mike's Mobile Sports
Date of Race: 04-30-2026
Description: Coach Mike will be running an after school sports program at ...
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OPR School After School Program
Organization: Coach Mike's Mobile Sports
Date of Race: 04-13-2026
Description: Coach Mike will be running an after school sports program at ...
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Summer Intro to Lacrosse Clinic
Organization: Coach Mike's Mobile Sports
Date of Race: 06-22-2026
Description: Coach Mike will be coaching an Intro to Lacrosse clinic at ...
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Summer Baseball Clinic
Organization: Coach Mike's Mobile Sports
Date of Race: 07-27-2026
Description: Coach Mike will be coaching a Baseball clinic at On Base ...
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Fri: In Your Hands
Organization: The Munroe Center for the Arts
Date of Race: 04-10-2026
Description: If making art is something you love to do, join this ...
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Weds: In Your Hands
Organization: The Munroe Center for the Arts
Date of Race: 04-08-2026
Description: If making art is something you love to do, join this ...
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St Catherine's Spring Session
Organization: Coach Mike's Mobile Sports
Date of Race: 04-07-2026
Description: Coach Mike will be running an after school sports program at ...
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322 -26 Checking Clinic
Organization: Greg Carter's European Hockey Camp
Date of Race: 04-21-2026
Description: Our Checking Clinic is led by highly respected coaches Eric Short, ...
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Complete list of running events in and near Marlborough, MA: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Marlborough
About Marlborough
Marlborough (MA) is a city in Middlesex County with an estimated population of 38,499.[4]
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Did you know?
In 2014, 57% of marathon finishers in the U.S. were men; women made up 43% of finishers.
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