Wye Valley Tunnel Run (Marathon, Half, 10k, Colourburst)

Relish Running races

From Relish Running races

4.1 · 11 reviews
Sunday 18th July 2027
10:00
Sedbury
£10.80–£64.80 · 13 races
5km, 10km, Half Marathon

Rated 4.1/5 from 11 reviews

Event summary

Get ready for an exciting day of running at the Wye Valley Tunnel Run on Sunday, July 18th, 2027! Hosted by Relish Running races, this vibrant event takes place in the picturesque Sedbury, Gloucestershire, along the stunning Wye Valley Greenway. Participants can choose from a variety of race distances, including a full marathon, half marathon, 10km, and the fun-filled Colourburst event, making it perfect for runners of all levels.

Experience the thrill of running through the historic 1.1km Tidenham Tunnel, a highlight of the route that showcases the beauty of the old railway line along the serene River Wye. As you cross the finish line, you'll be rewarded with a unique custom medal and a delightful feast of tasty treats to celebrate your achievement. Join us for a fantastic day of community spirit, beautiful scenery, and unforgettable memories at the Wye Valley Tunnel Run!

Races

  • Colour 500m

    Provisional Start Time 09:20

    £10.80

    0

  • Colour 2k

    Provisional Start Time 09:20

    £12.96

    0

  • Valley View 10k Ticket Wave 1

    Predicted time less than 55mins, Provisional Start Time 10:45

    £34.56

    0

  • Valley View 10k Ticket Wave 2

    predicted time less than 60mins, Provisional Start Time 10.55

    £34.56

    0

  • Valley View 10k Ticket Wave 3

    Predicted time less than 55-65mins, Provisional Start Time 11:05

    £34.56

    0

  • Valley View 10k Ticket Wave 4

    Predicted time less than 55-65mins, Provisional Start Time 11:15

    £34.56

    0

  • Valley View 10k Ticket Wave 5

    Open to all, Provisional Start Time 11:25

    £34.56

    0

  • Valley View 10k Ticket Wave 6

    predicted time more than 60mins, Provisional Start Time 11:35

    £34.56

    0

  • Valley View Half Marathon Ticket Wave 1

    Predicted time less than 2hrs. Provisional Start Time 10:20

    £49.68

    0

  • Valley View Half Marathon Ticket Wave 2

    Open at all. Provisional Start Time 10:30

    £49.68

    0

  • Tintern Station Half Marathon Wave 1

    Predicted time less than 2hrs15mins, Provisional Start Time 10:00

    £49.68

    0

  • Tintern Station Half Marathon Wave 2

    Open to all, Provisional Start Time 10:30

    £49.68

    0

  • Tintern Station Marathon Ticket Wave 1

    Open to all. Provisional Start Time 10:05

    £64.80

    0

A £2.00 service charge is added per booking

Event information

Organiser's description

Run along the newly opened Wye Valley Greenway, an old railway line that runs along the river Wye.

The highlight of the route is the 1.1km long Tidenham Tunnel, part of the old railway line, now a newly opened shared use path.

All finisher's receive a unique custom medal and a feast of tasty treats.

Reviews

4.1

11 reviews

SL
sorcha lonergan Verified entrant

Took part in the 2026 edition · 3 months ago

Brilliant event! My first ever race, very well organised, lovely staff and volunteers - very well done!! Thank you to everyone involved.
SB
Slayer Boon Verified entrant

Took part in the 2025 edition · 1 year ago

Great event. Well organised. Really good atmosphere. Ample parking right next to the start point. Really unique run with the tunnel, lovely views and some real off-road trail type areas. I had a great time.
CK
Caroline Kane

Reviewing the 2025 edition · 1 year ago

Wye Valley Tunnel Half Marathon:
⭐️⭐️⭐️⭐️⭐️ 5/5 – A Wild, Wonderful, and Unforgettable Race!
The Wye Valley Tunnel Half Marathon by Relish Running was one of the most unique and memorable events I’ve ever done. From the moment I arrived, I was impressed with how well-organised Race HQ was – indoors in a school hall (perfect for shelter and pre-race prep), with helpful signage, friendly staff, and a welcoming atmosphere.
The course itself is a brilliant mix of tarmac and trail, and the standout feature is, of course, the 1.5-mile tunnel – which we got to experience FOUR times! I absolutely loved it. Cool air, moody lighting, and a surreal feeling of floating as all you could see were faint outlines of runners ahead. I had music pumping and it turned into a bit of a tunnel disco!
Mother Nature threw everything at us this year – torrential rain, ankle-deep puddles, and real “Tough Mudder” energy on the trail sections. It was wild but made for an epic adventure. Despite the weather, the marshals were absolute stars – so cheerful, supportive, and motivating throughout.
A big shoutout to the camaraderie on the course too – from friendly runners offering encouragement to strangers recognising each other from past races. It felt like a real running community.
I also appreciated that the option to drop down to the 10K was offered due to the extreme conditions, but I stuck with the half and was so glad I did. The sun came out in the second half, and knowing what to expect made it all the more enjoyable.
Oh, and the medal? STUNNING. A real keepsake from a race I’ll never forget.
Thank you Relish Running – can’t wait to come back for more!
EH
Ebony Holland Verified entrant

Took part in the 2024 edition · 2 years ago

Really enjoyed this 10km race. Well organised. Lovely route, and especially enjoyed running through the tunnel!
MV
Mark Vickers Verified entrant

Took part in the 2024 edition · 2 years ago

Very well marshalled and a very friendly event. Thank you to the organisers.

Parking was in one of two schools - I had a later wave and had no issues.

I was expecting this to be a 'flat' run on paving/roads but in reality in is rather hilly, albeit not sharp inclines and on non paved terrain. The tunnel was quite busy at times, dark which made seeing where you were treading very difficult.
LD
Leanne Darbyshire

Reviewing the 2023 edition · 3 years ago

I think the organisers need to update the description of this race, it was not "very flat" but instead featured two sets of quite steep steps. The path was very muddy in places and as others have said it is more of a trail run, which was fun just not quite what I was expecting! Some lovely scenery, the trees provided nice shade from the sun and the tunnel was definitely a highlight. The start was delayed which caused some confusion but overall the organisation was pretty good for the price.
SH
Stuart Hook Verified entrant

Took part in the 2023 edition · 3 years ago

Not 'very flat' as advertised. Also, the wave system with the different races wasn't great as there ended up being a lot of traffic on the course. The checking in 'admin' was well organised however.
JD
Jeremy Dobbs Verified entrant

Took part in the 2023 edition · 3 years ago

Great organisation and people, BUT HELL OF A HILL at half way that they don’t warn you about!! Walking up steps/boulders and over the top to the midway point/water station! I pitied the marathon runners facing that for a second time! Once was enough and added 3-5mins to my time! Also little signal so don’t rely on your Garmin!!
EB
Esther Bonnick Verified entrant

Took part in the 2023 edition · 3 years ago

The Wye Valley Tunnel Half marathon was a beautiful, well organised race. The route was varied and interesting, with beautiful views over the Wye Valley and 2k in the tunnel. However, the route was a lot more hilly than advertised, with several steep steps and long gruelling hills. The route can also be muddy with small bridges and gates to go through, making it more of a trail run. If I was expecting this, it would have been fine, however the description calls it 'very flat', which it is not, so we struggled a bit! I would definitely recommend this run if you were looking for a good trail half marathon, but it is not a course for a PB. We still really enjoyed the day and it was a great sense of achievement, thank you!
AB
Andre Bakker

Reviewing the 2022 edition · 4 years ago

Lucky me to have joined this race. The tunnel was quite an experience. Well organized run, many thanks!
HW
Hannah Wormald Verified entrant

Took part in the 2022 edition · 4 years ago

We did the colour burst 2k. Everyone was very friendly and there was a good atmosphere. It would be nice, for next time, if the route could be a little more interesting instead of just running around a field.

Location

Wyedean School & Sixth Form Centre, Beachley Road, Chepstow NP16 7AA, UK

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Wye Valley Tunnel Run (Marathon, Half, 10k, Colourburst)

18th Jul 2027

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13 races