Race Discovery
The Mass Half
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The Mass Half

Worcester, Massachusetts, United States View on map
Mar 21, 2027 (America/New_York local time)
Running

About this race

  CENTRAL MASS IS READY FOR A RACE OF ITS OWN

For the first time in more than a decade, runners will once again have the chance to race a half marathon in Worcester. Set in the spring and timed with the Boston Marathon season, The Mass Half offers a unique opportunity to train, race, and celebrate in the Heart of the Commonwealth, whether you’re pursuing a personal best, preparing for Boston, or simply looking for a great reason to run.

But the experience extends well beyond the course. With thousands of runners expected to take part, The Mass Half will bring new energy to Worcester and Central Massachusetts, creating opportunities for local businesses, nonprofits, corporations, volunteers, and community partners to be part of one of the region’s biggest new annual events.

As United Way of Central Massachusetts’ signature annual fundraiser, powered by M&T Bank, The Mass Half also puts purpose behind every mile. Proceeds will support UWCM and nonprofit organizations across the region, helping advance the work that makes Central Massachusetts a stronger, healthier, and more resilient place to live.

The Mass Half is a race for the region; and an invitation for everyone to be part of what comes next.

Pick your distance

Running

The Mass Half (run only)

I just want to run!

Mar 21, 2027 Half-Marathon 8:00 AM
$85.00
Open

The Mass Half (run + fundraise)

I want to run and fundraise! If you meet a fundraising minimum of $1000, your registration fee will be reimbursed. You have until (DATE) to reach this fundraising goal.

Mar 21, 2027 Half-Marathon 8:00 AM
$85.00
Open

Typical race-day weather

Based on 2 years of Open-Meteo archive data for this event's race dates in Worcester, plus the 3 days either side.

Temp (°C)
Minimum temperature (race-week average) -1.5° / Maximum temperature (race-week average) 8.0°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-week average) -6.4° / Maximum feels like — heat index / wind chill (race-week average) 5.5°
Peak wind (km/h)
Strongest wind of the day (race-week average)
16.0
Precip (mm)
Precipitation over the day (race-week average)
0.0mm
Humidity
Mean relative humidity (race-week average)
56.7%
Sunrise
Sunrise at the start line on March 21, 2027 (EDT)
Sunset
Sunset at the start line on March 21, 2027 (EDT)
Daylight
Hours between sunrise and sunset on race day
12h 11m

The sun rises at 6:48 AM and sets at 7:00 PM local time (EDT) in Worcester on March 21, 2027 — 12h 11m 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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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, 18 Worcester events

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