The Welwyn Half Marathon and 10k offers runners an autumnal adventure that starts and finishes on the sleek, fast lanes of Gosling Sports Park's 400m athletics track. As you set off from this impressive venue, you'll be directed through the verdant outskirts of Welwyn, where a serene atmosphere awaits. For half marathon participants, your route takes you along Cole-Green Way, an idyllic former railway line now transformed into a peaceful traffic-free running path. This section provides runners with a tranquil and uninterrupted stretch to push their pace before looping back onto Cole-Green for the return journey. The race then reverses its course, leading competitors through Welwyn's leafy streets once more until you circle back to Gosling Sports Park. The event is licensed by UK Athletics under full supervision, ensuring accuracy in timing provided by Event Chip Timing. With a 3-hour cut-off time set in place for the half marathon route, runners are encouraged to maintain their pace throughout the scenic course. On race day, participants can look forward to an engaging pre-race warm-up session led by professional personal trainers and will be greeted with live commentary as they cross the finish line. Spectators can enjoy quality catering services while cheering on runners from every corner of this vibrant event. Registration opens at 08:30 AM for both races, allowing ample time before the main start at 09:30 AM. For younger participants, a complimentary Children’s Fun Run takes place just fifteen minutes prior to the half marathon's departure, giving kids and parents alike an opportunity to enjoy a short but spirited race on the same track. This event isn't merely about crossing the finish line; it immerses you in Welwyn’s charming landscape while providing top-notch support from start to finish.
Races Offered
10K
Oct 04, 2026
straighten
Distance —
10K
terrain
Type —
Running
timer
60 days remaining
sell
£32.78
Half Marathon
Oct 04, 2026
straighten
Distance —
21.1K
terrain
Type —
Running
timer
60 days remaining
sell
£41.40
Weather History
These values represent the 3-year monthly averages for October in Stanborough.
thermostatTemperature
8.9° / 15.1°
wb_sunnyFeels like
6.0° / 12.6°
light_mode
Avg sunshine hours
5h 51m
water_drop
Avg rainfall
2.3 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
13.8 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
84.7%
wb_twilight
Sunrise
07:26
nightlight
Sunset
18:05
About Stanborough
Learn more about the host city, Stanborough.
Stanborough is the site of an Iron Age hill fort near the village of Halwell, south of Totnes, Devon, England. The fort is situated on a promontory on the western edge of a hill at about 200 metres (660 ft) above sea level. The site was first listed as a historical heritage in 1923.