Cambridge Half Marathon 2025: Dates, Routes, Registration

Three separate Cambridge half marathons share a name but occupy three different countries—England, Massachusetts, and New Zealand—across different 2025 weekends. Each event has its own character, course, and registration process, so knowing which one you are actually looking for is the first step to planning your race calendar.

What date is the Cambridge half marathon 2025?

Three Cambridge half marathons, three different countries, three different weekends. The UK charity edition organized by Cambs CF took place on Sunday 9 March 2025, while the Cambridge Harriers event in New Zealand ran on 21 September 2025 from Tom Voyle Park. In the United States, the CambridgeSide event in Massachusetts occupied the first weekend of November, with half marathon on Sunday 2 November (CambridgeSide event page).

UK Charity Event

The Cambs CF Cambridge Half Marathon in England is a major annual fundraiser for mental health charities in East Anglia. The 2025 edition raised funds through Suffolk Mind, with runners encouraged to hit individual sponsorship targets alongside their registration fee (Suffolk Mind event details). Registration cost £50 for the charity place, discounted from the standard £105 rate. The event village occupied Midsummer Common on Victoria Avenue for race number pickup and post-race refreshments.

US Massachusetts Event

The US Cambridge Half Marathon runs out of CambridgeSide in East Cambridge, a shopping center at 100 CambridgeSide Place. The 2025 event featured both a half marathon on Sunday and a 5K on Saturday. The half marathon starts at 7:00 AM sharp from CambridgeSide, with the 5K departing at 10:00 AM on Saturday (CambridgeSide event portal). The course is USATF certified at 13.1 miles.

New Zealand Event

Cambridge, New Zealand—a small town near Hamilton in Waikato—is home to the Cambridge Harriers Half Marathon. The 2025 event on 21 September offered multiple distance options: the half marathon run at 9:00 AM, a half marathon walk at 8:30 AM, a quarter marathon (10.7km), a 5K, and a 2km kids dash. Early bird fees ran NZ$65 for the half marathon and NZ$75 for late registration. Race numbers were collected from Tom Voyle Park Club Rooms, with pickup available on Saturday 20th from 1pm to 3pm and Sunday 21st from 7:30am onward (Race Roster registration page).

Runners looking for a single Cambridge Half Marathon date were actually searching for three separate events. A passport would let ambitious runners theoretically complete all three in one calendar year.

What time is the Cambridge half marathon?

Start times vary significantly by location and distance choice. The New Zealand Cambridge Half Marathon Run began at 9:00 AM NZST on 21 September 2025 from Tom Voyle Park, with the half marathon walk setting off at 8:30 AM the same morning. The US half marathon in Cambridge, MA starts at 7:00 AM on Sunday 2 November, while the accompanying 5K kicks off at 10:00 AM the day before (CambridgeSide event details).

Start Times by Location

The pattern shows US events start earliest to avoid midday heat, NZ runs mid-morning for local comfort, and the UK uses a flexible wave system to handle its larger field of approximately 15,000 participants.

Wave Starts

The UK event operates a wave-based start system to manage the large field of approximately 15,000 runners. Runners are allocated to waves based on their expected finish time, with faster participants typically toward the front. Specific wave times are communicated via email in the week leading up to race day.

Is the Cambridge half marathon hilly?

All three Cambridge Half Marathon courses are essentially flat, but the surfaces and scenery differ enough to matter. The UK course through Cambridge, England is described as fast and flat, winding through historic streets and university college grounds on paved roads. The US course along the Charles River is similarly flat but mixes waterfront paths with urban streets, offering views of MIT, the John W. Weeks Footbridge, and Harvard University Stadium (CambridgeSide course description). The New Zealand course, while officially classed as mostly flat, features approximately 36m of total elevation gain spread across two loops.

Course Terrain

The NZ Cambridge Half Marathon surface breakdown reveals why “flat” requires context: 11km on concrete shared path, 8km on fine gravel, and 2km on tar seal. The gravel sections can feel slower underfoot than pavement, especially if recent rain has loosened the surface. The two-loop design means you will see the same neighborhoods twice—handy for pacing but potentially demoralizing if you are struggling in the second lap (Race Roster course details).

Elevation Profile

The UK TTP Cambridge Half Marathon is a USATF certified course, which means it meets strict standards for distance accuracy and course measurement. With over 95,000 finishers across its history and more than £3 million raised for charity, the event has built a reputation as a fast course for personal bests (TTP Cambridge Half Marathon official overview). The Massachusetts course is also USATF certified, measured at exactly 13.1 miles from start to finish at CambridgeSide.

A flat course does not mean an easy course. Wind exposure on exposed sections—the UK section near Trumpington, the US Charles River path—can add meaningful resistance on race day. Runners should check the forecast for sustained headwinds and adjust pacing strategy accordingly.

Cambridge half marathon 2025 route

The routes differ dramatically between locations, reflecting each Cambridge’s distinct character. The UK course passes through centuries-old college backyards and over the River Cam via historic bridges, while the US version hugs the Charles River shoreline before cutting inland past university landmarks. The NZ course stays within a small town context, passing through residential streets, rural roads, and along waterways in the Cambridge/Hamilton periphery.

UK Route Highlights

The UK Cambridge Half Marathon starts and finishes on Midsummer Common, with the course threading through Cambridge city center before entering the university grounds. Runners pass King’s College, cross the mathematical bridges, and skirt the backs of colleges where medieval architecture meets manicured lawns. The event village at Midsummer Common provides gear check, charity stalls, and post-race entertainment.

Views and Landmarks

The US Cambridge Half Marathon course delivers what runners consistently describe as “incredible views of Cambridge and Harvard.” The course traces the Charles River before looping past MIT’s campus and the Harvard University Stadium, offering a visual feast that competes with the physical challenge of 13.1 miles. The out-and-back sections on the 5K route maximize riverside scenery.

Cambridge half marathon 2025 registration

Each event has its own registration system, pricing structure, and deadline timeline. The UK charity edition through Cambs CF requires separate registration with a fundraising commitment on top of the £50-£105 entry fee. The US event at CambridgeSide operates through RunSignUp with separate sign-up for the half marathon and 5K. The New Zealand event uses Race Roster, with early bird pricing available until early September.

How to Register

For the UK event, the primary registration portal is cambridgehalfmarathon.com, where runners can pre-register for future events and find charity partner information. The Cambs CF charity places work through Suffolk Mind, with fundraisers setting up personal sponsorship pages linked to their entry. For the US Cambridge Half Marathon, registration runs through the CambridgeSide events page on RunSignUp (CambridgeSide registration portal). The NZ event registration is managed directly through Race Roster, with early bird rates available until specific cutoff dates.

Pre-registration for 2026

The UK TTP Cambridge Half Marathon has already opened pre-registration for the 2026 edition. The organizers have raised over £3 million for various charities across the event’s history and continue to partner with mental health and community organizations (TTP Cambridge Half Marathon official site). Runners who missed the 2025 charity places—or who want to lock in their spot well ahead—can join the interest list through the official website.

UK runners can target a flat course through UNESCO-listed university architecture with strong charity partnerships through Suffolk Mind and a proven track record of more than 95,000 finishers across the event’s history. The 3-hour-30-minute cutoff gives walkers and joggers a realistic target without excluding those chasing fast times. US runners benefit from CambridgeSide event’s USATF certification and MIT/Harvard views that few urban half marathons can match. NZ runners can use the September date as a mid-spring window perfect for training buildups targeting spring marathons elsewhere in the world.

Related reading: Champions Trophy 2025 Schedule

The flat scenic 13.1-mile course on 9 March draws thousands, where the results route and photos guide details past results alongside key route highlights for preparation.

Frequently asked questions