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

3.8 · 8 reviews
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From Relish Running races

  • Date Sun 20th July 2025
  • Location Sedbury, Gloucestershire
  • Price £10.80 - £59.40
  • Races 13 races
  • Distances 5km, 10km, Half Marathon

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

Sun 20th July 2025

3.8 · 8 reviews
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Event summary

Get ready for an unforgettable experience at the Wye Valley Tunnel Run, taking place on Sunday, July 20th, 2025, in Sedbury, Gloucestershire! Organized by Relish Running Races, this exciting event offers something for everyone with marathon, half marathon, and 10km race distances. Participants will have the unique opportunity to run along the scenic Wye Valley Greenway, which follows the beautiful River Wye and features the impressive 1.1km long Tidenham Tunnel—an iconic part of the old railway line now transformed into a shared use path.

As you cross the finish line, you'll be greeted with a custom medal that celebrates your achievement and a delightful array of tasty treats to refuel after your run. Whether you're a seasoned runner or just starting your journey, the Wye Valley Tunnel Run promises a joyful and invigorating day filled with camaraderie and stunning views. Don’t miss out on this fantastic event—mark your calendars and prepare to make lasting memories on July 20th!

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

Sun 20th July 2025

A group of runners, wearing various colored shirts and numbers, are participating in a race passing under a bridge with stone and metal supports. The background features lush green trees suggesting a forested area. The ground appears to be a dirt path. Dimly lit tunnel with rough, textured stone walls. Small lights are mounted intermittently along the left side, casting shadows on the uneven surface. The floor appears to be a gravel pathway extending into darkness. The atmosphere is eerie and serene. A dimly lit, paved tunnel with stone walls extending into the distance. Small lights run along one side, casting an orange glow. A small light is visible at the end of the tunnel, highlighting its length. A sign on the left shows the number 44 and an arrow. A stone tunnel with an arched entrance, partially covered by foliage and surrounded by lush greenery. The path leading into the tunnel is unpaved and well-trodden, and the inside of the tunnel appears dark due to shadows. A vintage signal box stands elevated with a wooden and brick structure. A staircase leads to the entrance, with “Tintern Old Station” displayed on a sign. Surrounded by greenery, with trees in the background, the scene is tranquil and bathed in soft daylight. A scenic view of a lush green valley with trees and shrubs in the foreground. In the middle distance, there's a historic abbey surrounded by more greenery and a few scattered buildings. Forested hills rise in the background under a partly cloudy sky. A group of seven people, including adults and children, stand outdoors on a sunny day, smiling and wearing white shirts covered in colorful powder. Green grass and houses are visible in the background, and each person has a race bib with "Color Run" on it.

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.

Races

  • Colour 500m

    Provisional Start Time 09:20

    £10.80

    Booking for more than 1?

  • Colour 2km

    Provisional Start Time 09:20

    £12.96

    Booking for more than 1?

  • Valley View 10km Ticket Wave 1

    Predicted Time Less Than 55mins, Provisional Start Time 10:45

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 2

    Predicted Time Less Than 60mins, Provisional Start Time 10.55

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 3

    Predicted Time Less Than 55-65mins, Provisional Start Time 11:05

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 4

    Predicted Time Less Than 55-65mins, Provisional Start Time 11:15

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 5

    Open to All, Provisional Start Time 11:25

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 6

    Predicted Time More Than 60mins, Provisional Start Time 11:35

    £31.32

    Booking for more than 1?

  • Valley View Half Marathon Ticket Wave 1

    Predicted Time Less Than 2hrs. Provisional Start Time 10:20

    £45.36

    Booking for more than 1?

  • Valley View Half Marathon Ticket Wave 2

    Open at All. Provisional Start Time 10:30

    £45.36

    Booking for more than 1?

  • Tintern Station Half Marathon Wave 1

    Predicted Time Less Than 2hrs15mins, Provisional Start Time 10:00

    £45.36

    Booking for more than 1?

  • Tintern Station Half Marathon Wave 2

    Predicted Time Greater Than 2hrs 15min, Provisional Start Time 10:30

    £45.36

    Booking for more than 1?

  • Tintern Station Marathon Ticket Wave 1

    Open to All. Provisional Start Time 10:05

    £59.40

    Booking for more than 1?

Book

  • Colour 500m

    Provisional Start Time 09:20

    £10.80

    Booking for more than 1?

  • Colour 2km

    Provisional Start Time 09:20

    £12.96

    Booking for more than 1?

  • Valley View 10km Ticket Wave 1

    Predicted Time Less Than 55mins, Provisional Start Time 10:45

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 2

    Predicted Time Less Than 60mins, Provisional Start Time 10.55

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 3

    Predicted Time Less Than 55-65mins, Provisional Start Time 11:05

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 4

    Predicted Time Less Than 55-65mins, Provisional Start Time 11:15

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 5

    Open to All, Provisional Start Time 11:25

    £31.32

    Booking for more than 1?

  • Valley View 10km Ticket Wave 6

    Predicted Time More Than 60mins, Provisional Start Time 11:35

    £31.32

    Booking for more than 1?

  • Valley View Half Marathon Ticket Wave 1

    Predicted Time Less Than 2hrs. Provisional Start Time 10:20

    £45.36

    Booking for more than 1?

  • Valley View Half Marathon Ticket Wave 2

    Open at All. Provisional Start Time 10:30

    £45.36

    Booking for more than 1?

  • Tintern Station Half Marathon Wave 1

    Predicted Time Less Than 2hrs15mins, Provisional Start Time 10:00

    £45.36

    Booking for more than 1?

  • Tintern Station Half Marathon Wave 2

    Predicted Time Greater Than 2hrs 15min, Provisional Start Time 10:30

    £45.36

    Booking for more than 1?

  • Tintern Station Marathon Ticket Wave 1

    Open to All. Provisional Start Time 10:05

    £59.40

    Booking for more than 1?

Course Details

All our courses are very comprehensively marked and well marshalled so you can relax and enjoy your run. The vast majority of the route is on old railway track, a flat and solid surface. It is not perfectly smooth, but it is a good surface

There are on site toilets and a mobile coffee van. There is a bag drop. There are no changing rooms.

Spectators are very welcome. The best location to watch is the start / finish line area as there are no easy access points out on the course.

What's Included

  • Unique finisher's medal
  • Buffet of delicious post race treats
  • Really friendly, inclusive atmosphere, perfect for your first race

How to Get There

The Wye Valley Tunnel Run is 25mins from Bristol, 40mins from Bath, 40mins from Cardiff, 2hrs 15mins
from London.

There is on site parking which is £2/car payable to the schools that we use for parking.

The nearest train station is Chepstow, which is 1 mile from the start line.

FAQs

  • Can I run with a dog?

    No, sorry, not at this event.

  • Can I run with a buggy?

    Runners with buggies are very welcome. Please note the terrain is a mix of compact stone path, road, forest path and tarmac for the 6km and 10km. The Half Marathon and Marathon routes are not suitable.

  • Do I get a medal?

    All runners of 5km and longer distances will take home a large 10cm x 10cm, 2 sided medal specific to this event. Fun run medals may be a mix of designs

  • Is there a cut off?

    There is a 3hr cut off to start lap 2 of the marathon Please note the event is not open to people would like to purely walk the event, but if you need to do a mix of running/jogging/walking to complete your distance then we are very happy with that.

  • Are there drinks stations?

    There are one drinks station on the 6km. There is at least 1 feast station on the 10km, 3 feast stations on the Half Marathon tickets and 7 feast stations on the Marathon. There will be water, electrolyte to drink and a mix of food including GF, DF and vegan snacks around the course and again at the finish. There will be flat coke on lap 2 of the marathon.

Prizes

All runners of 5km and longer distances will take home a large 10cm x 10cm, 2 sided medal specific to this event. Fun run medals may be a mix of designs.

Prize Categories

Top 3 male and top 3 female
First U20 male and female
First 20-39 male and female
First 40-49 male and female
First 50-59 male and female
First 60-69 male and female
First 70+ male and female

The final number of prizes awarded is determined by the number of finishers for each gender in a given race distance. If there are more than 100 finishers then the full range range of awards are made as shown above. If there are less than 50-100 finishers then the top 3 finishers overall will be awarded a prize. If there are less than 50 then only the winner will be awarded a prize. We do not have any winner's prizes for any of the children's events as would like to keep this participation focused.

There is no on the day prize giving because of the multi wave, multi start time format of the events. Prize winners will be contacted mid week via email.

colourburst

We have a 500m and a 2km Colourbust event which is on laps of the Wyedean School football pitch, a great spectator friendly environment which lets us maximise the number of colour stations. There are medals for all our little runners too!

We strongly recommend that you bring goggles or sun glasses to keep the colour powder out of your eyes. We also encourage mums and dads to consider a change of clothes and shoes for the journey home :-)

These events are open for runners of all ages, particularly runners who would be too young to do our 5km race (min age 12). There is no minimum age for these colourburst runs and they are not timed events!

The colourburst is infact 100% food grade corn starch with coloured dye, it is 100% safe, edible but not at all tasty so eating it is not encouraged, and 100% biodegradable.

Valley View 10km

A 1 lap course. This is an out and back route, predominantly on the old railway line so it is lovely and flat and benefits from a lot of tree shading which is great on a warm day. This route has 2km in the tunnel which comes mid way on each length of the route. The route is predominantly flat.

Half Marathon

Valley View Half Marathon Ticket: A 2 lap course. This is an out and back route, predominantly on the old railway line so it is lovely and flat and benefits from a lot of tree shading which is great on a warm day. This route has 4km in the tunnel which comes mid way on each length of the route. The route is predominantly flat.

Tintern Station Half Marathon Ticket: A 1 lap course which takes you through the Valley View route areas and beyond. This is a largely very flat route, with a 50m rocky climb and few sections of steps as the route transitions from one flat area to another. The route is essentially out and back route following the railway line all the way from Sedbury on the outskirts of Chepstow, all the way to Tintern Station where there is a looped section. This route has 2km in the tunnel, lots of running along the riverside trails and has a turnaround point at Tintern Old Station with a feast station stop along the old platform. The route is predominantly very flat being based on old railway trails and river side paths.

Tintern Station Marathon

A 2 lap course which takes you through the Valley View route areas and beyond. This is a largely very flat route, with a 50m rocky climb and few sections of steps as the route transitions from one flat area to another. The route is essentially out and back route following the railway line all the way from Sedbury on the outskirts of Chepstow, all the way to Tintern Station where there is a looped section. This route has 4km in the tunnel, lots of running along the riverside trails and has a turnaround point at Tintern Old Station with a feast station stop along the old platform. There is a 3hr cut off to start the second lap. The route is predominantly very flat being based on old railway trails and river side paths.

Reviews

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  • 5
  • 4
  • 3
  • 2
  • 1

3.8

8 reviews

EH
Ebony

·a month ago

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

·3 months 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.
Leanne avatar
Leanne

·a year 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

·a year 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

·a year 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

·a year 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

·2 years ago

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

·2 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.
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Location

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

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

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