Millis Boosters Run Back to School

About the Event

Millis Boosters Run Back to School 5k and 1 mile Fun Run

The Boosters are excited to be hosting our fun, community "Run Back to School" event for our 8th year!! Join us for a 5k course of rolling hills through Millis or a 1 mile fun run on the school grounds. All proceeds go to the athletes and teams of Millis Middle/High School as well as projects that support the entire Athletic Department. We look forward to having kids, parents, families, and community members join us for a morning of fun, fitness, music, and celebration. We welcome runners, walkers, and strollers! Our 5k is chip-timed by Second Wind Timing and an immediate print out of your results will be available. Check-in and race day registration will begin at 7:30am and we encourage you to arrive at least 30 minutes ahead of your race starting.

Awards

5K

Prizes for top overall winners and age-group medals will be awarded.

Fun Run

Our 1 mile fun run is for kids, adults, families, teams, or anyone. The 1 mile will not be chip-timed but a large timing clock will be at the finish to show you how you did and prizes/medals will be awarded to the top 3 male and female finishers (12 and under)!

Registration

There are no price increases this year and we incentivize early registration and participation from students with discounts! Early bird registration ends on August 1. Don't wait! Prices increase by $5 until online registration closes September 27. Race day registration begins at 7:30am and all prices increase by an additional $5. There is special pricing for high school aged and younger athletes participating in the 5k!

Donate

Can't participate? Please consider making a donation at this link.

T-Shirts

To get your free t-shirt, you MUST be registered by Fri. 9/4/25.

We look forward to seeing you for a day of fun, music, and movement!! All proceeds support the Millis Middle and High School athletes and athletic programs.

Races Offered

1 Mile Fun Run

Sep 27, 2026

straighten

Distance — 1 Miles

terrain

Type — Running

timer

09:00

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$15.00

5K Run or Walk

Sep 27, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

09:30

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$25.00

Weather History

These values represent the 3-year monthly averages for September in Millis.

thermostat Temperature

13.7° / 22.9°

wb_sunny Feels like

12.8° / 22.2°

light_mode Avg sunshine hours

8h 37m

water_drop Avg rainfall

3.7 mm

ac_unit Avg snowfall

—

air Avg wind speed

9.5 km/h (Light breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (5.0)

humidity_mid Humidity

78.9%

wb_twilight Sunrise

06:25

nightlight Sunset

18:53

About Millis

Learn more about the host city, Millis.

Millis is a town in Norfolk County in the U.S. state of Massachusetts. It had a population of 8,460 at the 2020 census. It contains the census-designated place of Millis-Clicquot. The town is approximately 19 miles (31 km) southwest of downtown Boston and is bordered by Norfolk, Sherborn, Holliston, Medfield, and Medway. Massachusetts state routes 109 and 115 run through Millis.