Experience the thrill of a stadium finish at the ATW Welwyn Half Marathon & 10k on October 4, 2026, a beloved autumn race that begins and ends on the prestigious 400m track of Gosling Sports Park. The half marathon route unfolds on a picturesque multi-terrain journey, guiding you through Welwyn's leafy fringes onto the serene, traffic-free Cole Green Way—a disused railway line transformed into a peaceful runner's haven. Meanwhile, the 10k shares the initial scenic 5km before carving its own memorable loop, ensuring both distances offer a perfect blend of challenge and natural beauty. Renowned for its friendly atmosphere and exceptional organization, the event features a lively warm-up, encouraging marshals, and a vibrant finish-line festival with catering for supporters. Every participant is celebrated with a custom medal, free professional photos, and the unique opportunity to sprint the final lap to roaring applause. With its hassle-free transfer policy and community-focused ethos, this race is the ideal season finale for runners seeking a well-supported, scenic, and spirited event. Secure your Early Bird entry for a crisp October morning where personal achievement is met with stadium-scale celebration.
Races Offered
10K
Oct 04, 2026
straighten
Distance —
10K
terrain
Type ——
timer
09:30
Half Marathon
Oct 04, 2026
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Distance —
21.1K
terrain
Type ——
timer
09:30
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.