Lace up for the Cambridge 5K @ CambridgeSide, a flat and fast race winding through the vibrant heart of East Cambridge and Inman Square on Sunday, May 31, 2026. This USATF-certified 5K offers a superb opportunity for a personal best, featuring a minimal 30 feet of elevation gain and scenic views alongside the Charles River and the Boston skyline. Runners can expect typical race day conditions with highs around 71°F and lows around 55°F, and only a 15% chance of precipitation, providing ideal weather for a memorable run.

The race starts and finishes conveniently at CambridgeSide, promising a hassle-free experience with five complimentary parking vouchers included in your registration. Upon crossing the finish line, the celebration truly begins with a lively post-race party at the new CanalSide Food + Drink hall. Here, DJ Smooth Bee keeps the energy high, and participants receive two complimentary drink tickets to redeem at the C-Side Bar for the signature Zero Gravity – Green State Lager, along with a refreshing bottle of water. Your registration also includes a short-sleeve technical t-shirt, and your participation supports meaningful causes like the MSPCA and the Helen K. Holland Animal Care Trust Fund.

Praised by runners for its enjoyable atmosphere and fast course, the Cambridge 5K @ CambridgeSide is more than just a race; it's a community event that kicks off the Cambridge Half Marathon + 5K weekend. Awards are given to the top overall male, female, and non-binary finishers, as well as the top three male and female finishers across various age divisions, and even the largest teams. With its fantastic course, scenic backdrop, and an epic post-race celebration, this 5K promises an unforgettable experience for runners of all levels.