Two Tunnels Railway Races (Half Marathon, 10k, 5k, Colourburst)

Relish Running races

From Relish Running races

4.7 · 35 reviews
Sunday 21st February 2027
10:00
Bath
£10.80–£49.68 · 17 races
5km, 10km, Half Marathon

Rated 4.7/5 from 35 reviews

30 already signed up

Event summary

Get ready for a unique and exhilarating running experience at the Two Tunnels Railway Races, taking place on Sunday, February 21, 2027, in the picturesque city of Bath, Bath and North East Somerset. Organized by Relish Running Races, this event features an array of race distances, including a Half Marathon, 10km, 5km, and a fun Colourburst with options for 2km and 500m, ensuring that there’s something for every member of the family.

What sets this race apart is its stunning route, which includes the UK's longest underground sections, allowing participants to run through the beautifully restored Devonshire and Combe Down Tunnels. These tunnels, once part of the Somerset & Dorset Railway, have been transformed into a well-lit and surfaced shared use path, providing a memorable backdrop for runners, walkers, and cyclists alike. Starting and finishing at Brickfields Park, the event not only provides a fantastic racing experience but also a chance for families to enjoy a picnic and cheer on participants. Plus, by taking part, you’ll be supporting Sustrans with a £1 donation per runner, contributing to the ongoing maintenance of these incredible tunnels. Don’t miss out on this exciting event that combines fitness

Races

  • 500m Colourburst

    Provisional Start Time 09:20

    £10.80

    0

  • 2k Colourburst

    Provisional Start Time 09:20

    £12.96

    0

  • 5k - Wave 1

    Predicted time less than 35mins, Provisional Start Time 10:40 approx

    £28.08

    0

  • 5k - Wave 2

    Open to all abilities. Start Time 10:50 approx

    £28.08

    0

  • Hilly Ticket 10k

    Open to all. Provisional Start Time 10:40

    £34.56

    Entries closed

  • Return Ticket 10k Wave 1

    Predicted time less than 52mins. Provisional Start Time 11:00 approx

    £34.56

    0

  • Return Ticket 10k Wave 2

    Predicted time less than 55mins. Provisional Start Time 11:10 approx

    £34.56

    0

  • Return Ticket 10k Wave 3

    Predicted time between 55-65mins. Provisional Start Time 11:20 approx

    £34.56

    0

  • Return Ticket 10k Wave 4

    Predicted time between 55-65mins. Provisional Start Time 11:30 approx

    £34.56

    0

  • Return Ticket 10k Wave 5

    Predicted time between 55-70mins. Provisional Start Time 11:40 approx

    £34.56

    0

  • Return Ticket 10k Wave 6

    Open to all. Provisional Start Time 11:40 - 12:00 approx

    £34.56

    0

  • Return Ticket 10k Wave 7

    Predicted time more than 60mins. Provisional Start Time 11:40 - 12:00 approx

    £34.56

    0

  • Hilly Ticket Half Marathon Wave 1

    Open to all. Provisional Start time 10:10

    £49.68

    0

  • Hilly Ticket Half Marathon Wave 2

    Open to all. Provisional start time 10:10 approx

    £49.68

    0

  • Return Ticket Half Marathon Wave 1

    Predicted time less than 2hrs. Provisional Start Time 10:00

    £49.68

    0

  • Return Ticket Half Marathon Wave 2

    Open at all. Provisional Start Time 10:20

    £49.68

    0

  • Return Ticket Half Marathon Wave 3

    Predicted time greater than 2hrs. Provisional Start Time 10:30

    £49.68

    0

A £2.00 service charge is added per booking

Event information

Event video

Organiser's description

A truly special race that not only takes in many of Bath's beautiful attractions, but also has the longest underground section for each race distance in the UK!

Cutting right under the city of the Bath, the two tunnels offer a truly unique running experience. The Somerset & Dorset Railway closed in 1966 and until April 2013, the tunnels had been sealed and inaccessible. Thanks to the hard work and dedication of the Two Tunnels Group and Sustrans over a period of 7 years, the two tunnels now have a new lease of life as a shared use path. The first tunnel, the Devonshire Tunnel is 408m long and the second tunnel, Combe Down Tunnel is 1672m long. Both tunnels are well lit and well surfaced and have recently been converted into a shared use path for the enjoyment of runners, walkers and cyclists looking to make the most of the city whilst remaining on flatter ground.

With 2 different half marathons, 2 different 10kms, 5km, 2km and 500m Colourburst races there are events for all the family, and if they are not taking part, bring your friends and family to cheer you on. Our start and finish is at Brickfields Park in the middle of the city which also has a children's play ground and is a great spot to sit and enjoy a picnic after the race.

We are very happy to be supporting the ongoing work of Sustrans in maintaining the Two Tunnels by contributing £1 per runner to their charity. Looking to fund raise as part of your run, why not raise money for Sustrans? You will get a lovely free running vest and other goodies. Find our more here. In 2019 we donated £5,254 to Sustrans

Reviews

4.7

35 reviews

GK
Grace Kirkus Verified entrant

Took part in the 2026 edition · 2 months ago

Amazing run and amazing atmosphere, a bit hilly and staircases but overall I enjoyed it very much.
Thank you for this experience and see you next year<3
MO
Maryam Ouiles

Reviewing the 2026 edition · 2 months ago

Excellent event. Really enjoyed it. Well organised, athletes looked after every step of the way. As for the course - the tunnels were so nice and cool on a hot day and the course was a good surface and scenic too. Would recommend.
KB
Katrina Brundell Verified entrant

Took part in the 2026 edition · 5 months ago

Thank you to all the Bath Two Tunnels Railway Races for making this event a fantastic day! A great run & brilliant day!!
JD
Jason Donnison

Reviewing the 2025 edition · 1 year ago

The Course was less flat with more Hilly parts than I thought however it was a great run and the crowds were very supportive and encouraging which I needed especially on the final climb to the homestretch, I equalled my modern day PB so was delighted to have finished 1st in my age bracket, definitely worth the effort to have the experience of running through the Devonshire Tunnel
Great organisation guys, wicked medal and good luck with the next one in August and thank you again
CP
Carole Pugh Verified entrant

Took part in the 2025 edition · 1 year ago

I did the City Half marathon, the tunnels are great, the route was very scenic. The marshal's and feed stations were well placed. The downside I feel was starting a half marathon so late in the morning, regardless of the heat. Also the return to the P&R involved an hour wait, which wasn't great in the heat leading to one competitor passing out in the queue.
JA
JAMES AVERY Verified entrant

Took part in the 2025 edition · 1 year ago

Marathon two laps of a scenic course very well marshalled and supported by excellent start finish facilities. Vast majority of the run on the flat however around the start and finish it is undulating with a few sharper than expected short hills. Feed stations had everything required including plenty of encouragement. Would highly recommend either doing full marathon or the half to experience the event. Please note in August the sun maybe out, with little or no protection unless in the tunnels which are amazing!
SB
Slayer Boon

Reviewing the 2025 edition · 1 year ago

Great event. Super well organised. Special buses put on from the P+R. Everything was easy to find. Plenty of facilities. The volunteers and staff were excellent and really friendly. They were super encouraging around the course. The course itself is really interesting, from the tunnels themselves to the picturesque section along the Canal to a change of scenery into the City centre. Loved it. Will do again.
TZ
Thomas Zheng Verified entrant

Took part in the 2025 edition · 1 year ago

Ran my first 10k yesterday! Hope to be here again next year! Lovely track, lovely atmosphere
HM
Hannah Marsh Verified entrant

Took part in the 2025 edition · 1 year ago

Fabulous event. Very well organised. Lovely encouraging Marshals. I loved it!
HT
haydn tickner Verified entrant

Took part in the 2024 edition · 2 years ago

I ran the Two tunnels as my First half. It was super organised, having done the Bristol 10k earlier in the week, The support the staff and volunteers gave during the race was incredible, the refreshments and drinks at the stops were great and there was plenty of them around. Thank you for a great experience. Would have given 5/5, as it did say no headphones so I did not bring any(due to disqualification), however loads of people ran with theirs, so was a little frustrating that the message was not conveyed.
RT
richard tansley

Reviewing the 2023 edition · 3 years ago

Excellent race, well organised with lots of helpers to make sure you stay on course.Fast through the tunnels and beautiful scenery,a great experience
XP
Xavier Prior Verified entrant

Took part in the 2023 edition · 3 years ago

It was a great event with friendly and encouraging marshalls. It was also well signposted and well organised with good feeding stations.
NW
Nicola White Verified entrant

Took part in the 2023 edition · 3 years ago

I ran the marathon but before the race I received no race information and had to get everything searching on the site to get answers.
The course is good just a shame about the incline towards the end which is demoralising.
Hi Nicola

The full race information was on our website 10 weeks before the event, on the Event Info page on our website. An email was sent to all runners on the Monday of race week, with a few key reminders and further directing runners to the info page. Unfortunately emails sometimes get picked up by spam filters, but all the info was there in plenty of time :-)
Relish Running races
Relish Running races
LJ
Libby Jackson Verified entrant

Took part in the 2023 edition · 3 years ago

Lovely race, welcoming of all abilities, smiling and cheering marshals, and I loved running through the tunnels, especially on a warm June day. The route is shared with the public so you'll get a few cyclists overtaking but they were all respectful and shared the path (as did the runners).
KD
Kevin Dibble Verified entrant

Took part in the 2023 edition · 3 years ago

First time doing the two tunnels 10k.... very well organised and a fantastic run, definitely recommend and will be doing again
MR
Martin Roach Verified entrant

Took part in the 2023 edition · 3 years ago

Well organised as ever, and it was quite a novelty to run through the two tunnels! My only slight gripe was that I had quite a long wait for the shuttle bus back to the P&R car park, but this didn't detract from a most enjoyable experience. For future entrants, I would definitely recommend wearing a headlight, as the lighting in the tunnels is quite dim.
AI
akintayo Idowu Verified entrant

Took part in the 2023 edition · 3 years ago

I really liked running the tunnels, very cool temperature as your doing the half marathon return so allowed me to go faster, I would bring a headlight. Need to work on how to start the race so we don't do the precarious mud slide down to the path....maybe throw down some gravel or bark?
The marshals were great
Enjoyed the race and got a half marathon PB
TW
Trina Webb Verified entrant

Took part in the 2023 edition · 3 years ago

Really great race!
Very well organised with friendly encouraging marshals. I'm definitely looking forward to gaining the second half of my medal in the next race!
If you haven't ran in March then get yourself booked on for June!!
Thank you to everyone that made the race a success and well done to all who participated!
DC
David Coles Verified entrant

Took part in the 2023 edition · 3 years ago

Great run, very well organised. Fairly flat for Bath, and the tunnels make the run interesting as well as breaking up the run.
Big shout out to all of the volunteers who help to make it a great day.
RS
Rory Spanton Verified entrant

Took part in the 2022 edition · 3 years ago

Nice flat course (I did the 10K) with a good atmosphere and friendly volunteers. The tunnels were really cool on a hot day, too!

Location

Brickfields Park, The Hollow, Twerton, Bath, UK

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Two Tunnels Railway Races (Half Marathon, 10k, 5k, Colourburst)

21st Feb 2027

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