From the Organizer
We are thrilled to announce our school's fourth annual 5K event, and we want you to be a part of it! Lace up your running shoes and join us for a fun-filled morning of St. Mary school spirit and community bonding. This event is open to everyone. Your participation will be contributing to a great cause, with proceeds benefiting our school’s programs and initiatives. So gather your friends, family, and classmates, and let’s all come together for a memorable day of fun, fitness, and fundraising. Save the date and run, walk, or jog your way through the finish line and toward a healthier and happier school community. Let’s make this 5K an event to remember!
Race day will also include a ticketed raffle for prizes such as fitness classes and gift cards to local businesses!
The St. Mary's 5K is an officially timed race that starts and finishes at St. Mary's School. Participants will receive race t-shirts, finish line photos, a free raffle ticket, and official race results.
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
72°
Typical Low
51°
Based on US Climate Normals data from Jamaica Plain, 2 mi from the venue.
Host City
About Brookline, MA
Nearest Airport
BOS
Boston Logan International Airport · 6 mi
Time Zone
Eastern Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at St. Mary’s 5K, put it on the calendar, and turn “someday” into a start date.
Coming Up
More Running races near Brookline, MA
Jerry papa ultra marathon
Marathon
2 miles away
Summer Classic 5K
5K
3 miles away
5k for Justice
5K
2 miles away
MIHEI Strides for Mothers 5k
5K
2 miles away
From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is the St. Mary’s 5K?
- St. Mary’s 5K is a running race held in Brookline, Massachusetts on September 26, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
- When and where is the St. Mary’s 5K?
- Saturday, September 26, 2026 in Brookline, Massachusetts at 67 HARVARD ST, Brookline, MA. Check the event page for exact start times and wave schedules.
- How do I register for the St. Mary’s 5K?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
St. Mary’s 5K
Sep 26, 2026