Westonbirt Arboretum (SUNDAY) Half Marathon, 10km, 5km & Fun Run

4.3 · 12 reviews
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From Relish Running races

  • Date Sun 6th September 2026
  • Time 08:00
  • Location Tetbury, Gloucestershire
  • Price £8.23 - £49.68
  • Races 11 races
  • Distances Half Marathon, 10km, 5km

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A serene park scene with a winding gravel path through tall trees with yellowing leaves, indicating autumn. Sunlight filters through the branches, casting dappled shadows on the grass. Bright green foliage contrasts with the warm autumn hues.

Westonbirt Arboretum (SUNDAY) Half Marathon, 10km, 5km & Fun Run

Sun 6th September 2026

4.3 · 12 reviews
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Event summary

Get ready for an unforgettable day of running and nature at the Westonbirt Arboretum Half Marathon, 10km, 5km, and Fun Run on Sunday, September 6, 2026! Organised by Relish Running Races, this exciting event takes place in the stunning surroundings of Tetbury, Gloucestershire, where participants will have the unique opportunity to run amidst over 2,500 species of trees, including rare national collections from around the globe.

The picturesque routes promise an enchanting experience, combining the solid terrain of a road with the captivating beauty of a trail run. Perfect for runners of all levels and families, your race ticket grants you all-day access to the arboretum, allowing you to explore its breathtaking landscapes. Plus, friends and family can join in on the fun for just £3 per person, gaining special access before 9am. Whether you’re aiming for a personal best or simply want to enjoy a day out in nature, the Westonbirt Arboretum event is the perfect blend of fitness and family-friendly adventure!

Westonbirt Arboretum (SUNDAY) Half Marathon, 10km, 5km & Fun Run

Sun 6th September 2026

A serene park scene with a winding gravel path through tall trees with yellowing leaves, indicating autumn. Sunlight filters through the branches, casting dappled shadows on the grass. Bright green foliage contrasts with the warm autumn hues. A sunlight-dappled path winds through a serene park lined with trees in autumn. Leaves in shades of green, yellow, and orange create a colorful canopy. The clear blue sky adds to the tranquil, vibrant scene. The photo captures vivid autumn foliage with red, orange, and yellow leaves on the trees, set against a bright blue sky. Some green pine needles are also visible, contrasting with the warm colors of the leaves. The perspective is looking straight up. A sunlit pathway in a park lined with tall trees. The sun's rays filter through the branches, casting long shadows on the leaf-covered ground. The trees, with sparse leaves, indicate a late autumn day under a clear blue sky. A view looking up at a large tree with gnarled and twisting branches. The tree's leaves are a mix of green and yellow, indicating a change of season. The sky in the background is clear and bright blue, and another tree partially frames the right side of the image.

Organiser's Description

Westonbirt is the National Arboretum, home to over 2,500 different species of tree! This includes 5 national collections, including rare trees from across the world. The route is incredibly beautiful, varied and interesting as you run through the different areas dedicated to specific species. The sold terrain underfoot gives you a surface more akin to a solid road surface, with all the beauty of a trail run.

Westonbirt is a great relaxing family day out with lots of activities for children too. As part of your race ticket you are welcome to stay and enjoy the arboretum for the whole day, and family, friends and supporters can gain access to the arboretum for just £3/person when travelling with a runner, for special access before 9am, and stay for the day too. Normal visitor ticket prices will be payable after 9am.

Races

  • Half Marathon - Wave 1

    Predicted Time Less Than 1hr 50mins, Provisional Start Time 08:00

    £49.68

    Booking for more than 1?

  • Half Marathon - Wave 2

    Predicted Time Less Than 2hrs. Provisional Start Time 08:05

    £49.68

    Booking for more than 1?

  • Half Marathon - Wave 3

    Predicted Time Less Than 2hrs 10mins. Provisional Start Time 08:10

    £49.68

    Booking for more than 1?

  • Half Marathon - Wave 4

    Open to All. Provisional Start Time 08:15

    £49.68

    Booking for more than 1?

  • Half Marathon - Wave 5

    Predicted Time Greater Than 2hrs 10mins. Provisional Start Time 08:20

    £49.68

    Booking for more than 1?

  • 10km - Wave 1

    Predicted Time Less Than 55mins, Provisional Start Time 08:41

    £34.56

    Booking for more than 1?

  • 10km - Wave 2

    Predicted Time 55-65 Mins, Provisional Start Time 08:47

    £34.56

    Booking for more than 1?

  • 10km - Wave 3

    Open to All. Provisional Start Time 08:53

    £34.56

    Booking for more than 1?

  • 10km - Wave 4

    Predicted Time Greater Than 60mins. Provisional Start Time 09:00

    £34.56

    Booking for more than 1?

  • 5km

    Provisional Start Time 08:34

    £28.08

    Booking for more than 1?

  • 1 Mile

    Open to All, Provisional Start Time 08:25

    £8.23

    Booking for more than 1?

Book

  • Half Marathon - Wave 1

    Predicted Time Less Than 1hr 50mins, Provisional Start Time 08:00

    £49.68

    Booking for more than 1?

  • Half Marathon - Wave 2

    Predicted Time Less Than 2hrs. Provisional Start Time 08:05

    £49.68

    Booking for more than 1?

  • Half Marathon - Wave 3

    Predicted Time Less Than 2hrs 10mins. Provisional Start Time 08:10

    £49.68

    Booking for more than 1?

  • Half Marathon - Wave 4

    Open to All. Provisional Start Time 08:15

    £49.68

    Booking for more than 1?

  • Half Marathon - Wave 5

    Predicted Time Greater Than 2hrs 10mins. Provisional Start Time 08:20

    £49.68

    Booking for more than 1?

  • 10km - Wave 1

    Predicted Time Less Than 55mins, Provisional Start Time 08:41

    £34.56

    Booking for more than 1?

  • 10km - Wave 2

    Predicted Time 55-65 Mins, Provisional Start Time 08:47

    £34.56

    Booking for more than 1?

  • 10km - Wave 3

    Open to All. Provisional Start Time 08:53

    £34.56

    Booking for more than 1?

  • 10km - Wave 4

    Predicted Time Greater Than 60mins. Provisional Start Time 09:00

    £34.56

    Booking for more than 1?

  • 5km

    Provisional Start Time 08:34

    £28.08

    Booking for more than 1?

  • 1 Mile

    Open to All, Provisional Start Time 08:25

    £8.23

    Booking for more than 1?

Course Details

A beautiful route lined with trees of different ages and rare species.

The vast majority of the routes are on solid stone forest paths. The routes are largely very flat, with only a couple of little rises and falls. All our courses are very comprehensively marked and well marshalled so you can relax and enjoy your run

What's Included

We have incredible FEAST stations to power you around the course, every 5km, loaded with tasty treats and refreshments including DF, GF and vegan snacks

  • Bespoke Custom Medal
  • Buffet of delicious post race treats
  • Really friendly, inclusive atmosphere, perfect for your first race

How to Get There

Westonbirt is 30mins from Bristol, 40mins from Bath, 60mins from Cardiff, 1hr 45mins from London.

The nearest train station is Kemble, which is 9 miles from Westonbirt.

Parking

Free Parking

Spectators need to purchase spectator tickets in advance from the Relish website, at the greatly reduced rate of £3/person, valid when entering the site before 09:00

Arrivals after 09:00 will be charged the usual visitor rate by the arboretum (£17/adult)

Location

Westonbirt Arboretum,
Westonbirt,
Tetbury,
GL8 8QS

What3Words /// monkey.booth.motored

FAQs

  • Can I run with a dog?

    Sorry, this is not an event which includes a canicross race

  • Can spectators attend?

    Greatly reduced rate of £3/spectator when entering the site before 09:00. After 09:00, usual visitor rates of £17/adult apply.

Reviews

Verified Purchase

A 'verified' purchase review means that we've verified that the person writing the review purchased their entry to this race on findarace.com.

  • 5
  • 4
  • 3
  • 2
  • 1

4.3

12 reviews

NS
Nicholas

·7 months ago

Loved this race, really well organised, fantastic course on firm ground throughout.
SO
Sally

·a year ago

Overall well organised and a lovely course. Really difficult for the spectators to understand who is in the lead and support
JS
Jo

·a year ago

Great event, nothing to complain about. Well organised, great staff, beautiful run.
JM
Jo

·a year ago

Really well organised event - marshalls were plentiful and supportive, helping to direct you around the course. The setting was lovely, nice and firm underfoot with 1 hill along the 10k (2 if you do the half-marathon). Clear finish line with a lovely straight so you can really power through. 3 water/fuel stations along the half marathon as well, although I never stopped there always seemed to be ample supplies of water, electrolytes, haribos, chocolates etc. The post-race supplies were good as well. Wooden medal, ice pops (a lovely treat!), energy bars and haribos etc. I felt it was all organised very efficiently and have had a really good experience for my first half marathon and my first time at this venue. It was a really relaxed atmosphere, unlike the Bristol 10k last month which was hectic!! Highly recommend. I heard one of the marshalls say my now-favourite phrase "run how you're feeling, not what your watch says" so thanks to him as it kept me going and I smashed my targeted time :)
Liz avatar
Liz

·a year ago

Very well organised with clear signage. Mainly flat with woodland type paths. Couple of short hills. The drinks, ice pops, sweets and chocolate were very welcome at the end. Great atmosphere
VR
Victoria

·a year ago

It was a really well organised event. Parking, collecting numbers, getting photos and seeing the times after race. However it would’ve been great to have more toilets! Just a row of portaloos were needed behind the event tent. A lot of people ended up having to go in the trees, which no one wants to do before a race! And also maybe another food truck to entice people to stay after. Just having one in the area probably wasn’t enough for all of the people who showed up.
JG
James

·a year ago

Beautiful setting, serious lack of toilets. Many very annoyed runners missed their start time as they were queuing for the loo
Chelsey avatar
Chelsey

·a year ago

Brilliant day! I wouldn't describe the course as flat, personally. But the inclines are manageable. Beautiful forestry throughout. Supportive marshals, beautiful medal. Well organised. Other runners made me feel very welcomed and safe at my first ever half marathon event. Can't wait for next year!
MM
Marie

·a year ago

Pros: - friendly, less corporate than other running events esp the AJ BELL ones - not crowded, ?12 waves for the 10k meant it wasn't crowded at the start - at an arboretum - very helpful marshals. Route was clearly signposted and well explained by the MC guy at the start Cons: - gravel, trail, slight inclines (83m elevation recorded on my strava for the 10k) so, not super fast as a course - the event had not portaloos and women had to queue (me incl) for about 20-25mins for the womens toilets at the entrance to the arboretum - because of the multiple waves, I had no idea when I finished (nor did my bf) of how we did in our gender categories
Gavin avatar
Gavin

·2 years ago

Very well organized, felt like I was miss lead a little when it said buffet as it wasn’t really a buffet. Also a lot of single use plastics where used durning the race so room for improvement but on the right path.
CM
Claire

·2 years ago

Best half marathon I have ever run. Beautiful route, really well-signposted. Very easy number pick up and water, snacks and medals all very well organised.
KK
Kirsten

·2 years ago

Loved it. Route was beautiful. Marshall’s so encouraging. Even though I am super slow I never felt out of place.
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Location

Westonbirt Arboretum, Tetbury, GL8 8QS, United Kingdom

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Westonbirt Arboretum (SUNDAY) Half Marathon, 10km, 5km & Fun Run

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