Tweed Valley Tunnel Trail Run

Saturday 16 October 2021

A beautiful off-road run through a stunning natural environment – with a very special twist in the tail! From autumnal beauty to underground awesomeness – there’s no other event like it.

The race starts and finishes in Peebles in the Scottish Borders. Three distances are available to choose from; 20km, 10km and 4km (which is open to younger runners too).

You’ll run on beautiful riverside paths through stunning woodlands, and up onto the hills with fabulous views of the Tweed Valley, in all its autumn splendour. But there’s a very cool surprise too.

The trail leaves the woods and dives into Neidpath Tunnel – a 600m railway tunnel, complete with lighting effects.

The routes makes a fantastic run even without the tunnel finale, but running out of the beauty of the Tweed valley autumn and into an unforgettable underground running track will be something you really won’t have experienced before! It’s amazing fun!

2021 Runners’ Notes

2021 Registration Times

2021 Results 

What you get:
  • Top quality trail event
  • Fully waymarked course
  • Electronic chip timing – results print out as you finish
  • Medal
  • Qualified medical support
  • Water / refreshment stop on route
  • Beautiful trail scenery
  • Tunnel finale with light effects

Here’s a preview of the course from Runner’s World Magazine.

Tweed Valley Tunnel Trail Walk

Saturday 16 October 2021 | 1.30pm

Experience a 3.5k walk starting at Haylodge Park in Peebles along beautiful trails beside the River Tweed and Southpark Woods and an opportunity to walk through the illuminated Neidpath Victorian railway tunnel in Peebles.

The walk begins after the Tunnel Trail Run, at 1.30pm, and you should expect to complete the walk within 60 minutes. Please remember the walk is an outdoor event on single track trails with uneven surfaces and certain safety guidelines apply. Outdoor footwear essential. Care should be taken on the paths. The walk and paths are unfortunately not suitable for wheelchairs, buggies and prams. Children (under 16s) must be accompanied.

2021 Walkers’ Notes

2021 Runners’ Notes

The small print


How long? What kind of trails?

The trail will provide a top quality run with a choice of three route lengths – and are around 4k, 10k and 20k. The routes will include beautiful scenery, trails by the River Tweed, a viaduct crossing, some cheeky climbs, open hillside and stunning forest.

The entire course is off road, with footpath, dirt track, gravel and stone surfacing along the way.

The start and finish are in lovely Hay Lodge Park in Peebles EH45 8JQ and the course follows the banks of the Tweed, past Neidpath Castle and over the railway viaduct before heading uphill and into the woods, with fabulous views down to Peebles and the valley. Mixed woodland trails bring you down to the Tunnel and a fun return to the park, where you cross the river again and return to the finish.

Take a look at the routes here: 4km10k and 20km

Are there age restrictions?

The 20km and 10km races are open to anyone over the age of 16.

4km race open to anyone over age of 11.

The Tunnel Trail Walk is open to people of all ages.

Is the event timed?

Timing is provided by a MyLaps system provide by RaceAhead timing. Your timing chip is on your race number bib and you’ll cross timing mats at the start and finish too record your time. You can choose, within a 30 minute period, when you want to start and the timing operates like a time-trial system. It’s not a mass start battle to get onto the trails first. Run on your own, run with your pals, start early, go at the back – it’s your choice, do what feels right.

Can I see my time from previous years?

Yes, previous race results listed here:

What’s the Tunnel all about?

Neidpath Railway Tunnel is 600m long with a curve in it which means when you’re in the middle, you can’t see either end, and normally it’s totally pitch black! It was opened in 1864 and was last used by a train in 1954, and it’s in remarkably good condition.

For the event, the lighting production maestros EPG, are going to rig the tunnel with some cool lighting effects which will make running through it a particularly interesting experience.

Headtorches are not necessary despite running through a tunnel!

Will the Tunnel be scary?

No, ‘fraid not. Come back another day and run through it in the dark if that’s your thing! (You won’t be disappointed.)

How does registration work?

This year we have two registration options.

  • You can register on the Saturday morning. – You will be allocated a registration time to avoid crowding at registration.
  • You can choose the postal ticket option and your number will be sent out to you in advance so all you need to do is turn up and race on the Saturday!

Registration open on Saturday 16 October from 9am.

What time do the races start?
  • 20km Runners starts from 10.15am
  • 10km Runners starts from 11:00am
  • 4km Runners starts from 12:15pm

Please arrive in plenty of time – at least 30 mins before you start

Is the event safe?

There will be marshals positioned throughout the route, and even inside the Tunnel. They will be in radio contact with Event HQ and can help in the very unlikely situation that you might need help.

The course will be clearly marked throughout with arrows and course tape where required.

What should I wear?

One of the joys of trail running is that all you really need is a pair of trainers and some water. Best to bring a waterproof just in case, and an extra layer in case you get cold afterwards. Please dress appropriately for the weather. Footwear with adequate grip for slippery off-road conditions required (trail shoes are strongly recommended for this event). 

How should I prepare?

If you haven’t run in a trail race before, please consider the following as you prepare:

  • The course will be undulating on a variety of terrains. Get used to running up and down inclines, and negotiating mud, roots and uneven tracks.
  • Become comfortable with your footwork – hips, ankles and legs aren’t used to uneven ground and changing direction if you’ve only run on tarmac before.
  • You’ll discover your pace in far more erratic in a trail race with both slow and fast sections, so you may not achieve your goal pace/race time.
  • You should start the race well hydrated and fuelled. You may want to carry an energy gel during the race.
  • There will be a water/refeshment stop on the course, but please do not solely rely on this if you think you will take a while to complete the course.
How do I get there?

Peebles is easily reached from all over the UK and a short transfer from airports and train stations. Regular bus services in the area are provided by First Group, Bus number 62.

If you are arriving by car the main roads into the Tweed Valley are the A7 and A701 from the South and the A701 from the North.  And if you’re arriving by air you will probably arrive via Newcastle or Edinburgh Airport.

The closest stations are Edinburgh Waverly Station or the brand new Galashiels Railway Station. Check Travelline Scotland for dedicated bus connections.
Share car transport whenever you can – there’s a very useful car-sharing website at www.tripshareborders.com


Where can I stay?

There is comprehensive list of local accommodation options over at the tweedlove website here, including hotels, B&Bs, self catering and camping.

Get Involved!

If you’re not taking part in the event, there are other ways you can get involved and enjoy the buzz Tweed Valley Tunnel Trail Run will bring!

An event like this needs a small army of helpers to make it work, so we are recruiting a marshaling team. It’s a great way to be part of the action and join in the excitement of this amazing day. Anyone who isn’t running (and is 16 or older) can apply and any necessary training or instruction will be provided.

To sign up email us at team@hillsideoutside.com if you are interested!


The latest event news and information.