Held under permit number 7402 (subject to confirmation), this unique race invites runners to tackle a devilishly challenging 6.66 km course, designed not just for speed but also for fun and creativity. Participants are encouraged to dress up in Halloween-themed costumes, adding an extra layer of excitement to the event. The route is meticulously mapped out via GPX/Strava with detailed instructions provided along the way. While the race itself is a serious affair, it’s infused with playful elements that make it stand apart from traditional running competitions. The atmosphere at this event promises to be lively and engaging, especially for those who embrace their inner Halloween spirit. Registration opens inside the brewery at 6:00 PM, where runners can leave personal belongings in a designated area (at their own risk). Participants are advised to arrive early as parking is limited around the venue until after 6 PM. Alternative transportation options such as cycling and walking from nearby locations like The Vineyards or local residential streets are highly recommended. The race starts promptly at 6:30 PM, with runners making their way through a course that combines urban terrain with some tricky obstacles tailored to keep participants on their toes both literally and figuratively. Upon crossing the finish line, racers will be greeted by marshals who record their times; it's crucial for runners to inform the marshal of their completion or else the clock continues counting. A key highlight is the costume contest, where the top three Halloween-themed outfits are selected by a panel of judges and fellow participants, earning trophies as prizes. The overall winner, chosen by the organizers including Hans, will take home an impressive mini-keg to celebrate their victory. In terms of safety, while zombies might catch runners who fall over (a playful nod to race marshals), vampires won't be drinking blood—though first aiders are present for any real injuries. Swearing too much could attract mythical "swearwolves," a humorous reminder to keep the language clean and focused on enjoying the run. This event is strictly for adults, with no participants under 18 allowed due to licensing restrictions at the venue. Overall, it’s an unforgettable blend of physical challenge and creative fun that caters to runners who love pushing their limits while embracing the spirit of Halloween.
Races Offered
Chelmsford "Boos" Co Halloween trail run (6.66!)
Oct 31, 2026
straighten
Distance —
Chelmsford "Boos" Co Halloween trail run (6.66!)
terrain
Type —
Cycling
timer
101 days remaining
sell
£17.50
Weather History
These values represent the 3-year monthly averages for October in Chelmsford.
thermostatTemperature
9.2° / 15.5°
wb_sunnyFeels like
6.3° / 12.8°
light_mode
Avg sunshine hours
6h 0m
water_drop
Avg rainfall
2.2 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
14.6 km/h (Gentle breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Low (2.8)
humidity_mid
Humidity
84.2%
wb_twilight
Sunrise
07:24
nightlight
Sunset
18:02
About Chelmsford
Learn more about the host city, Chelmsford.
Chelmsford is a city in Essex, England. It is the county town of Essex and one of three cities in the county, along with Colchester and Southend-on-Sea. It is located 31 miles (50 km) north-east of Charing Cross in London, and 22 miles (35 km) south-west of Colchester. At the 2021 census the built up area had a population of 110,625. It gives its name to the wider Chelmsford local government district which also covers an extensive surrounding area.