Two Tunnels Railway Races - Ultra & Relay

Brickfields Park, Bath

Organiser's Description

An opportunity to run a 50km ultra either as a solo runner or as a pair in relay, through Bath's Combe Down and Devonshire Tunnels - disused railway tunnels which until 2013 were sealed and inaccessible. This unique and truly special race takes in many of Bath's beautiful attractions, and also has the longest underground sections of any running race in the UK!

This is the last of 4 events in 2019, which offer a variety of events for all the family. Start and finish will be in Brickfields Park in the middle of the City - a green park with children's playground, a great spot to sit and enjoy a picnic after the race.

Start Time



  • 50 km Solo - UKA Affiliated Min age 20
    £48 BOOK
  • 50 km Solo - Unaffiliated Min age 20
    £50 BOOK
  • 50 km Pair - UKA Affiliated Price per pair
    £56 BOOK
  • 50 km Pair - Unaffiliated Price per pair
    £60 BOOK
  • 50 km Relay Team of 5 people
    £90 BOOK

Brickfields Park, 47 King George's Rd, Bath BA2 1LX

The Two Tunnels events are being staged at Brickfields Open Space (BA2 1LX) in the city of Bath.

If you live in Bath please consider walking or cycling to the site in the spirit of our event partner Sustrans. We will provide bike racking for cyclists.

If you are driving to Bath please park at Odd Down Park & Ride (BA2 8PA) and catch the Two Tunnels bus to the race site (£3 return for adults, £9 for a group of 5 adults and free for U16s). From here it is a 500m walk to the race site which will be signed with pink or orange signs.

Oldfield Park train station is approximately 800m from Brickfields.

All our runners receive a top of the range custom medal, as well as a buffet of fresh fruit and other tasty treats.

Running vest


Bag Drop

A number of prizes are awarded, determined by the total number of finishers (male and female combined) in a given race distance.

A green park complete with children's playground and table tennis table, a great spot to sit and enjoy a picnic after the race.

This event will be held over 50km (31.125 miles), on an accurately measured course. The event will be held on loops of the 10km course and there will be two feed stations per lap, each with a selection fresh fruit, cakes, cookies, jelly beans, water and other refreshments. The event will be electronically timed at the 10km turn around point at each lap.

The races will start at 8:30am. There is a cut off of 8.5hrs for the 50km but please note that walkers are not eligible for this event.

There are 3 formats depending on if you are covering the 50km solo, as a pair, or as a 5 person relay.

Solo: 50km Solo runners complete the whole 50km as an individual and will certainly get a strong feeling of tunnel vision as 20km of their race will be underground! Solo runners will each take home FOUR medals.

Pair: 2 runners will alternate 10km legs to cover the 50km distance. 10km legs can be run in any combination but all change overs must take place in the Start/Finish area after a multiple of 10km has been covered eg 10km, 20km. For example 50km as Runner 1, Runner 2, Runner 2, Runner 1, Runner 2. Only one runner can be actively running at once (both runners can not run 10km together and have it count as 20km). Each member of the relay pair will take home FOUR medals.

Relay: 5 runners team up to run the 50km in a relay, covering 10km each. Change overs must take place at the Start/Finish area after 10km has been covered. Each person cover 1 x 10km leg. Each runner takes home one 10km medal.

These events are set off in waves of approximately 100 runners set off every 10mins. This is because of the relatively narrow nature of the route. Each distance (5km, 10km, Half Marathon, Marathon) will have multiple waves to choose from when you register.

The waves are organised by predicted finish time, with one wave open to runners of all predicted finish times to make it easier for people who wish to travel together. Please confer with friends and family before you register to ensure you select the same wave if you wish to start together. The different start times are fully accounted for in the results so you pick any wave and get an accurate finish time.

Competitor information

Sorry, booking has closed for this event 🙁

  • 50 km Solo - UKA Affiliated Min age 20
    £48 CLOSED
  • 50 km Solo - Unaffiliated Min age 20
    £50 CLOSED
  • 50 km Pair - UKA Affiliated Price per pair
    £56 CLOSED
  • 50 km Pair - Unaffiliated Price per pair
    £60 CLOSED
  • 50 km Relay Team of 5 people
    £90 CLOSED
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Lovely scenery and great support

This is a lovely scenic route; lots of miles along the canal, some beautiful views of the viaducts and the tunnel stretches kept things interesting. The support was excellent and the Marathon ran smoothly. This had a very relaxed and friendly feel to the day. There was no on site parking and the park and ride was a bit of a faff for being so far away from the city centre, similarly, the start/finish line are a little away from the city centre making it a bit tricky for family to support. The route map could be a little clearer to help family track the route and offer support, but the route was very clear on the day itself.
If the start/finish were in a more central location, or a closer park and ride was arranged, I'd definitely give this five stars - but the positives; a beautiful route, organised well, with super friendly people gets this four stars from me.

Matt Potts / Aug 19, 2019

10k route

I was so impressed on how well organised it was! The 10k route is nice and flat as you would imagine it would be being an old railway line. Lovely and cool through the tunnels, really impressive! If you’re at your infancy in running or you want a PB then this is ideal!! This is definitely one for my running event calendar!!

Lee Jones / Aug 19, 2019

Underground, overground....

Interesting, well-organised race through tunnels, villages and along a great stretch of towpath; brilliantly marshalled throughout; main difficulty apart from the relentlessness of waterside miles was weaving through Sunday crowds in the city centre stretches; rates high as a 'special' race.

John Cooper / Aug 19, 2019

Half marathon route

There is a cheeky bit of hill work mile 3-4 then goes flat along the canal found it difficult with lack of support on this part, very very cheeky hill at the end but was well organised

Gemma Dooley / Aug 19, 2019

Super well organised event

I did my first Two Tunnels event yesterday and was very impressed with the organisation. Getting there was easy, park and ride buses laid on. There were several waves for each distance and the tunnels made running a whole new experience.

David Hudson / Aug 19, 2019

Absolutely unique

One tunnel is 1KM ,
Other is 1 mile.
you go through them and back, twice.
So you spend the majority of this run underground and out of the heat and sun.

Absolutely unique run and I really enjoyed it, very flat

Eddie Milner / Jul 17, 2019

An extravagant route!

One of the best extravagant routes for a PB on a half marathon!
Fantastic tunnels to cool off in whilst undergoing the route and an overall flat course; to enable a PB!

Hannah Goodwin / May 14, 2019

So much fun!

Angus James / May 13, 2019

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