No, that would have taken forever!
Actually, I did briefly consider sending Phanta over the Stang instead, but it was just too complicated with different groups and stuff - and the Stang is much, much harder.
Is it even worse than that horrible track?!
That was definitely the least fun bit IMHO, though everyone else seemed not to be bothered. I was paranoid about getting another puncture from all the rocks strewn about, and also worried about holding everyone up. After some words of advice from mrcharly and slowcoach, I did ride most of it (except the really bad bits). Not the worst COR I've done, but the worst on 25mm slicks I think. The descent down past the farm, when it got vaguely tarmac-like again, was fun though!
It's much, much steeper. Do you recall the right turn at Langthwaite signposted Barnard Castle? It's that road.
So you'd have to descend to Langthwaite, climb back up to about the same altitude as Tan Hill (but at >16% gradients, rather than the gentle sweeps of Arkengarthdale), then tackle the switchbacks on the <20% descent through the forest, and either ride along the A66 for a mile or so before coming back to Startforth, or hack along the up-and-down lanes through Scargill and Barningham to Smallways.
Actually, it's fantastic
But the extra climbing makes it harder and slower than the gradual descent you get on the route we took.