Cambridge Half Marathon

OCT-NOV

31-1

2026

Experience a fast and flat USATF certified course along the Charles River featuring iconic views of MIT and Harvard. Choose between a 5K and a half marathon starting at CambridgeSide for a memorable weekend of running.

31-1 Oct-Nov 2026

Cambridge, Massachusetts

Registration

13 miles 5 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Race Weekend in Cambridge

The Cambridge Half Marathon and 5K take place over a full race weekend, starting and finishing at CambridgeSide in Cambridge, Massachusetts. The event offers different distances across two days, including a combination challenge for those wishing to participate in both distances.

Participants have specific time limits to complete their races. The 5K has a net time limit of one hour, while the half marathon allows for three hours of net time. Registration options are available for standard participants as well as charity runners.

The event features the following distances:

5K (3.1 miles)
13.1 Miles (Half Marathon)

The 5K course is an out and back route along the Charles River, providing views of the Boston skyline. The 13.1-mile half marathon follows a fast, flat, and USATF certified course along Memorial Drive. Runners on this route pass several landmarks, including the Charles River, MIT, the John W. Weeks Footbridge, and Harvard University Stadium. Visit the organization's website for the most recent information.