Cambridge Half Marathon + 5K
- Date
- October 31, 2026
- Distance
- Cambridge Half Marathon · Cambridge Half Marathon Charity Runner · Cambridge 5K & more
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.
Distances & Pricing
Race Location
About This Sport
From Endurance Grid's Founder
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.
The half marathon is the distance where you find out what you're actually made of. Long enough to demand real preparation. Short enough that it doesn't consume your life to train for it. Most people who run their first half describe it as the race that changed their relationship with what they're capable of. Once you cross this finish line, the bar moves. That's not a warning — that's the point.
Race day energy varies by event size, but the finish line feeling is the same regardless. Big races keep the noise going the whole way. Smaller races give you stretches where it's just you and the miles — and that solitude becomes its own kind of fuel.
The half marathon rewards people who show up for the boring training miles.
How long to train: 10–14 weeks. If you're already running consistently, 10 weeks of structured buildup is enough. If you're building from a casual base, give yourself 14.
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.
Coming Up
More running races in MA
Frequently Asked Questions (FAQs)
- What is the Cambridge Half Marathon + 5K?
- Cambridge Half Marathon + 5K is a running event held in Cambridge, MA. Learn more about the different endurance sports here.
- When and where is the Cambridge Half Marathon + 5K?
- Saturday, October 31, 2026 in Cambridge, MA at 100 CambridgeSide Place, Cambridge, MA. Check the official event page for exact start times and wave schedules.
- How do I register for the Cambridge Half Marathon + 5K?
- Registration is handled through their official registration page. Confirm pricing, distances available, and sign up there.
Cambridge Half Marathon + 5K
Oct 31, 2026