Westonbirt Arboretum Summer
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Westonbirt Arboretum Races
The event comprises races held at Westonbirt Arboretum in Tetbury (GL8 8QS, what3words: monkey.booth.motored). Multiple race dates are scheduled in September 2026 and February 2027, including both day and night formats.
Distances offered
- Half Marathon
- 10 km
- 5 km
- 1 Mile Fun Run
Entry rules and age limits are published for each distance: the half marathon minimum age is 17, the 10 km minimum age is 14, the 5 km minimum age is 12, and there is no minimum age for the fun run. The February night 10 km and 5 km require a head torch or chest torch.
Course and on-course support The routes run mainly on solid stone forest paths and are largely flat with a few small rises. Runners start in waves of about 150. The 10 km includes one on-course feast station and the half marathon includes three; there is no drinks station on the 5 km. Stations offer water, electrolyte drinks and a mix of food including gluten free, dairy free and vegan options.
Facilities and other details On-site toilets, places to eat and a bag drop are available; there are no changing rooms. Buggy runners are permitted; canicross is not allowed. Finishers of 5 km and longer receive a 10 cm x 10 cm two-sided medal with a distance-specific ribbon. Group discount tiers and prize categories are published for participants. Photographs are available for purchase after the event. For night events the site closes in the evening. Visit the organization's website for the most recent information.
