Grenofen Tunnel - O2

In Dartmoor 365 JH says do not be tempted to walk through this tunnel as it is treacherous.  Since he wrote this a cycle path has been created from Yelverton to Tavistock that goes through this tunnel.  I have walked this route several times and it is generally a very pleasant walk with a good path. Going through the tunnel is the worse bit.  It is a long tunnel and very dark.  Water drips from the ceiling and there is a channel of water either side of the path.  On a warm day it is noticeably colder inside the tunnel than outside.  I have always been pleased when I have come out the other side.

Entering the tunnel
 
Nearly at the other end



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