Day 137 mile 137: Tynal Tywyll-The Dark Tunnel

2017-05-17 13.21.44Day 137 mile 137: Tynal Tywyll-The Dark Tunnel. The Bangor & Bethesda Railway was taken out of use in 1963, and some of it has been out of bounds to the public up until about a week ago. This includes a 400 m tunnel running beneath the Snowdonia hill side, known as Tynal Tywyll or The Dark Tunnel in English. What makes it even more intriguing is 1) the weather is looking changeable so subterranean exploits seem like a good idea 2) it is so newly reopened that I can’t find a map with the access to it indicated and 3) It’s a big tunnel that I never knew existed which I can get to and from in my lunch break!


It was a lovely excursion along a wooded pathway and over the river. The tunnel itself is an impressive feat of industrial revolution engineering, with enough lighting to be safe and visible and yet remain atmospheric. Given the obvious age of the actual construction it was quite endearing to be running on tarmac so fresh that you could still make out the slightly muddy boot and paw prints of those who had passed by previously. On exiting from the return journey through the tunnel it was fantastic to be greeted by a group of swifts, reeling though the air obviously catching the insects that we flying around in the shade of the mouth of the tunnel.

Great fun and a new thing discovered 🙂

I’m running a mile each day everyday for 2017. If you feel you can sponsor me please do, as all the money raised will go to the Cleft Lip & Palate Association (CLAPA) who provide services all across the UK to support people affected by it.

Distance: 1762.8 meters recorded

(1 mile = 1609.34 m.)
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Thanks as ever for all the support!



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