Two Tunnels Railway Races (Ultra, Marathon, Half Marathon, 10km, 5km, Colourburst)
Sunday, 16 August 2026 · Brickfields Park, The Hollow, Twerton, Bath, UK
Event summary
Join us for the exhilarating Two Tunnels Railway Races on Sunday, August 16, 2026, in the beautiful city of Bath, Bath and North East Somerset! Organised by Relish Running Races, this unique event promises an unforgettable running experience as participants traverse the longest underground sections for each race distance in the UK. Runners can choose from an exciting lineup of races including the Ultra, Marathon, Half Marathon, 10km, 5km, and a vibrant Colourburst event for all ages. Set against the stunning backdrop of Bath's attractions, the route takes you through the historic Devonshire Tunnel and the impressive Combe Down Tunnel, both transformed into a well-lit and well-surfaced shared path for everyone to enjoy. The start and finish lines are located at Brickfields Park, a perfect spot for friends and family to cheer you on or relax with a picnic after the race. Plus, by participating, you’ll be supporting Sustrans, as £1 from every runner will go towards maintaining the Two Tunnels. Sign up today and be part of this fantastic community event that celebrates health, heritage, and fun!
About this event
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
Distances & Prices
| Distance | Price | Status |
|---|---|---|
| 500m Colourburst | £10.80 | open |
| 2km Colourburst | £12.96 | open |
| 5km - Wave 1 | £28.08 | open |
| 5km - Wave 2 | £28.08 | open |
| Return Ticket 10km Wave 1 | £34.56 | open |
| Return Ticket 10km Wave 2 | £34.56 | open |
| Return Ticket 10km Wave 3 | £34.56 | open |
| Return Ticket 10km Wave 4 | £34.56 | open |
| Return Ticket 10km Wave 5 | £34.56 | open |
| Return Ticket 10km Wave 6 | £34.56 | open |
| Return Ticket 10km Wave 7 | £34.56 | open |
| City Ticket Half Marathon Wave 1 | £49.68 | open |
| City Ticket Marathon Half Wave 2 | £49.68 | open |
| City Ticket Marathon Half Wave 3 | £49.68 | open |
| City Ticket Marathon Half Wave 4 | £49.68 | open |
| City Ticket Marathon Half Wave 5 | £49.68 | open |
| City Ticket Marathon Half Wave 6 | £49.68 | open |
| Marathon Wave 1 | £64.80 | open |
| Marathon Wave 2 | £64.80 | open |
| Marathon Wave 3 | £64.80 | open |
| Marathon Wave 4 | £64.80 | open |
| 50km Solo | £70.20 | open |
| 50km Pair | £87.48 | open |
What's included
Bespoke Custom Medal Buffet of delicious post race treats Really friendly, inclusive atmosphere, perfect for your first race
The course
Some distances have multiple route options, known as Tickets, across the year, some repeated on each date, others available only once a year. Click the links to find out more about the 10km and Half Marathon routes. You can enter one or more races at any time. You can run multiple races on each day, please just make sure that the schedule would allow for this. The 5km, 10km and 50km have been officially measured and are perfect for a fast time and hunting down a new PB The Half and Marathon are a smidge over distance, still flat and fast, but a more scenic type of route. Terrain: All our courses are very comprehensively marked and well marshalled so you can relax and enjoy your run. The Return Ticket Routes (5km, 10km, Half, 50km) are essentially 100% tarmac, aside from a small amount on grass at the start and finish. The Hilly Ticket Routes (10km, Half) are a mix of tarmac, woodland trail and stone paths. The City Ticket Routes (Half, Marathon) are all on a very solid surface, a mix of tarmac, canal towpath and river path.
Getting there
If you are arriving by car then you need to park at Odd Down Park & Ride, BA2 8PA. What3Words /// pets.shops.stops and catch the shuttle bus to the race park. Please see the Event Info page for details. Bike racking is provided for cyclists, please bring your own lock.The nearest train station is Oldfield Park which is 800m from the start/finish. Bath Spa Train Station will have more frequent services and is 2 miles from the start/finish.
Gallery
FAQs
Minimum Ages
Min age is 17 for the Half. Min age 16 for the 10km. Min age 12 for the 5km. No min age for the Colourburst runs.
Price rises soon
From £10.80
