It runs up the Gill but it starts... oh wait it runs east by Smardale bridge and I didn't realise, I'm being dozy today, also bought some lunch by mistake that doesn't strictly fit in with my diet and didn't realise until I'd eaten it, first time I've done that too (though I bought the wrong drink by mistake last week).
I can't remember the reason, they're doing work on unstable something, might have been railings, might be a figment of my imagination.