Cambridge Half Marathon + 5K
Cambridge Half Marathon + 5K is a running race on October 31 – November 1, 2026 in Cambridge, MA, with entry fees from $45 to $180.
- Date
- October 31 – November 1, 2026 (100 days to go)
- Price
- $45–$180
- Sport
- Running
From the Organizer
The Cambridge 5K is the kickoff to race weekend! It's a 3.1-mile course that starts and finishes at CambridgeSide. It's a quick out and back along the Charles River that will have you in awe of the Boston skyline.
The Cambridge Half Marathon is a 13.1-mile USATF certified course that starts and finishes at CambridgeSide. It is a fast and flat course along Memorial Drive featuring views of the Charles River, MIT, John W. Weeks Footbridge, Harvard University Stadium, and more.
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
57°
Typical Low
43°
Chance of Rain
34%
Based on US Climate Normals data from Boston Logan Intl Ap, 3 mi from the venue.
Host City
About Cambridge, MA
Population
117,794
as of 2023
City Elevation
34 ft
Nearest Airport
BOS
Boston Logan International Airport · 5 mi
Time Zone
Eastern Time
From Endurance Grid
A mid-size host city. Enough lodging and amenities to keep race weekend easy, without big-city sprawl.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at Cambridge Half Marathon + 5K, put it on the calendar, and turn “someday” into a start date.
100
Days to train
- Race
- Cambridge Half Marathon + 5K
- Date
- October 31 – November 1, 2026
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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 an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
More Running races near Cambridge, MA
Stepping Forward: World PT Day 5K for Stroke Awareness
5K · 2 Constitution Wharf
Less than a mile away
Nuno 10K Run
10K · TBD
Less than a mile away
Boston 10K for Women
1K · 10K · From $65 · Boston Common
Less than a mile away
Esplanade 5K Run & Walk
5K · From $30 · Fiedler Field
Less than a mile away
Plan your trip
Make it a Racecation
Coming from out of town? There's more to Cambridge than race day. We'll help you line up nearby lodging, flights, a rental car, and things to do so you can make the most of your racecation.
Plan your trip to CambridgeFrequently Asked Questions (FAQs)
What is the Cambridge Half Marathon + 5K?+
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Cambridge Half Marathon + 5K
Oct 31, 2026