raceindex.org
Explore
Explore RaceIndex

Find your race. Make your plan.

Find a race

Choose your distance and destination.

Compare courses

See what changes from race to race.

Enter and prepare

Turn your choice into a race plan.

Race weekend

Plan travel, support and the finish.

Your next goal

Find a race that fits your experience.

Find a race
Compare courses
Enter and prepare
Race weekend
Your next goal
My Season Save races, keep preparation tasks and plan what comes next.
About RaceIndexOur methodologyData coverageCyclingTriathlon
  • 5K
  • 5 km
  • Cambridge
  • Event dates –
  • Open entry

Cambridge Half Marathon + 5K at CambridgeSide (Cambridge, MA) 5K

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2026 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

Official event website & entry ↗
Plan my trainingPlan my paceData current as of

Decision summary

Cambridge Half Marathon + 5K at CambridgeSide (Cambridge, MA) 5K at a glance

Typical conditions
84/100

Historical race-date favourability, not a forecast

Evidence depth
21 verified facts

Source facts available

Route details

Known course facts at a glance

Methodology →

Cambridge Half Marathon + 5K at CambridgeSide (Cambridge, MA) 5K has known course details for its 5k race. The summary below keeps the focus on what is confirmed for the course.

Official distance
5 km
Terrain
Road
Scenery
Riverside, City, Waterfront, Historic

Quick answers

What runners ask first

Where does the Cambridge Half Marathon + 5K at CambridgeSide (Cambridge, MA) route go?

The Cambridge Half Marathon + 5K at CambridgeSide (Cambridge, MA) route starts at s and finishes at CambridgeSide, 100 CambridgeSide Place, Cambridge, MA; 5K starts at 10:00 a.m. on Saturday, October 31, 2026. Underfoot, expect a road course. The setting includes riverside and city. Quick 3.1-mile out-and-back along the Charles River with views of the Boston skyline.

What should runners know on race day for the Cambridge Half Marathon + 5K at CambridgeSide (Cambridge, MA)?

Two-day running festival pairing a Saturday 5K (Oct 31, 2026) with a Sunday half marathon (Nov 1, 2026).

Race character

Scenery

  • Riverside
  • City
  • Waterfront
  • Historic

Atmosphere

  • Charity
  • Big City
  • Community

Terrain

  • Road

Entry, logistics and records

Records and field

Field size
Typical field of roughly 1,000-5,000 participants across the weekend.

Entry requirements

Entry status
Open entry: The held registration model is open entry and this edition is not marked sold out.

Race day logistics

Medal
Finisher's medal awarded at the finish line.
Finisher tee
Registration includes a long-sleeve quarter-zip pullover (2026 color: Carolina Blue); all race swag must be collected during bib pickup before the race.

Access and course status

Start
Starts and finishes at CambridgeSide, 100 CambridgeSide Place, Cambridge, MA; 5K starts at 10:00 a.m. on Saturday, October 31, 2026.

Course facts

Course type
Out And Back
Notable features
  • Two-day running festival pairing a Saturday 5K (Oct 31, 2026) with a Sunday half marathon (Nov 1, 2026)
  • a Challenge entry option lets runners do both. Note: this is the Cambridge, Massachusetts race and is distinct from the unrelated TTP Cambridge Half Marathon in Cambridge, England
  • Beneficiary charities include Cambridge Camping, the City of Cambridge Scholarship Fund and many other local causes, with 66+ charity partners supported over the event's history
  • Quick 3.1-mile out-and-back along the Charles River with views of the Boston skyline

What are typical race-day conditions?

  • 11°CTypical temperature
  • 23 kphTypical wind
  • 2 mmTypical rainfall
  • 84Favourability /100
Typical conditions for the race date and locality, within the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (2)

Read the full methodology →