Cambridge Half Marathon + 5K

Sat, Oct 31, 2026, 10:00 AM EDT

Location: 100 CambridgeSide Place, Cambridge, MA 02141
Type: Run

Official registration Past results

Race feel

Run a fast, flat course through Cambridge with stunning views of the Boston skyline and historic university landmarks.

Scenic
Competitive

The Cambridge Half Marathon and 5K offer a race weekend experience with courses starting and finishing at CambridgeSide. The 5K is a quick out-and-back along the Charles River, providing views of the Boston skyline. The Half Marathon is a USATF certified, fast, and flat 13.1-mile course along Memorial Drive, featuring scenic views of the Charles River, MIT, John W. Weeks Footbridge, and Harvard University Stadium.

What to expect

A quick out-and-back 5K along the Charles River with Boston skyline views.
A USATF certified, fast, and flat 13.1-mile course.
Enjoy continuous views of the Charles River, MIT, and Harvard University Stadium.

Standout details

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.