This one is from the Lake District Brian. It is in the Borrowdale Valley near Castle Crag. I couldn't say if its natural or man made to be honest.Intriguing shot Phil.
That looks like a dried-up river bed.
Is it, as I know there are a few in the Peak District?
Or, could it be an old packhorse route.
Well that’s Mt. Whitney directly above the right lane, and a view you wouldn’t have actually had on 395. I’d bet money you were here (ish) to get that photo -