Boston 5K Spring/Summer Series
About this race
This page is only for signing up to volunteer. Please navigate to the volunteer section to view the various shifts available.
Please find all other race info on our event page: Boston Spring Series.
The Boston Spring/Summer Series is made possible each year thanks to the help of our wonderful volunteers. We greatly appreciate your support! As a volunteer, you'll assist with number pickup, venue setup, registration, bag check, water stops, marshaling, medals/awards, and cleanup.
The Race:
One of eight 5K Thursday evening runs from April through September to kick cancer's butt. Races on 4/30, 5/21, 6/4 and 6/18 start with a Women's 5K, followed by the open 5K. Everyone races together in the final four races of the series.
All races are held at the American Legion Marsh Post #442 in Cambridge, MA, and run on paths along the Charles River. Each event will include a post-race party at the Marsh Post with beer generously provided by Mighty Squirrel. 100% of the event proceeds go to charity, including a portion to the American Legion Marsh Post. RACE Cancer Foundation’s Boston 5K Summer Series also provides funding for the Sunscreen Squad, bringing free sunscreen to outdoor events across Massachusetts.
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Running
Please click "Volunteer" in navigation above.
Please click "Volunteer" in navigation above.
Typical race-day weather
Based on 9 years of Open-Meteo archive data for this event's race dates in Cambridge, plus the 3 days either side.
The sun rises at 5:40 AM and sets at 7:42 PM local time (EDT) in Cambridge on April 30, 2026 — 14h 02m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
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Other races near Cambridge
Different organizers, within 40 miles, in the next three months
The Ryan Shaw Memorial 5k
The Beantown Winter Classic
Track Night Boston
Boston Purple Pumpkin 5K and Walk
🏃 Plan Your Next Race in Cambridge
Find upcoming events by distance:
- Cambridge 5K Races 9 races
- Cambridge Half Marathons 2 races
- Cambridge Running Calendar 2026 13 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 13 Cambridge events
Spotted something wrong? Tell us and we'll fix it.