The Tree House Brewing Company Half Marathon 2026 returns to Deerfield, Massachusetts on September 13th for its fourth annual event. Deerfield is a picturesque town in Western Massachusetts known for its historical charm and natural beauty. The race course begins at the historic Green, where runners will be greeted by the vibrant community before setting off towards Mount Sugarloaf. The route then follows the Connecticut River, offering scenic views of the surrounding forests and farmlands. Just before reaching the brewery, participants will run through a charming neighborhood with its quaint homes and friendly locals cheering them on. This event has been a cornerstone in Deerfield's calendar since 2023, attracting both seasoned runners and newcomers alike. Over the years, it has grown to support local initiatives and build community spirit. In addition to the race itself, an unforgettable celebration awaits at Tree House Brewery post-race with music, swag, and festivities. The course offers a challenging yet rewarding journey through diverse terrain. Runners will experience firm and slightly soft trail conditions as they ascend Mount Sugarloaf before descending back towards Deerfield’s historic Green. There are no aid stations along the route; however, participants can expect clear signage to guide them throughout their run. The weather on race day is typically mild with an average temperature of 18.1°C, though runners should prepare for a slight chance of rain and moderate UV exposure due to high humidity.
Tree House Brewing Company Half Marathon 21K • Start: 08:00:00 • Fee: $125.03
Waitlist for the 2026 Tree House Half Marathon 21K • Start: 08:00:00
Registration can be done via the following link: https://raceroster.com/events/2026/125824/tree-house-brewing-company-half-marathon-2026. The registration deadline is July 31, 2026 at 11:59pm. Bibs are not available for pick up on race day; runners must transfer them prior to the event. For bib transfers and any questions about logistics, contact organizers directly through their website or email. The start location is the historic Green in Deerfield, Massachusetts. Participants need to be at least 18 years old to participate. First-timers should ensure they have a race number, timing chip (if required), comfortable running gear, and proper nutrition for the event. This race is worth attending because it combines natural beauty with community spirit, all while supporting local initiatives through its charity efforts.
Races Offered
Tree House Brewing Company Half Marathon
Sep 13, 2026
straighten
Distance —
21K
terrain
Type —
Others,
Running
timer
08:00
sell
$125.03
Weather History
These values represent the 3-year monthly averages for September in Deerfield.
thermostatTemperature
12.4° / 23.7°
wb_sunnyFeels like
11.7° / 23.4°
light_mode
Avg sunshine hours
9h 7m
water_drop
Avg rainfall
3.5 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
6.8 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
77.5%
wb_twilight
Sunrise
06:30
nightlight
Sunset
18:58
About Deerfield
Learn more about the host city, Deerfield.
Deerfield is a small town in Franklin County in western Massachusetts. It is home to Deerfield Academy prep school.