MayDay2005
I have followed the line of Durham County definitive Right-of-Way map between the Ragpath Wood bridleway and the Biggin Farm track. I have separately tried to follow the route as marked on here. Neither one is a clearly evident route, though the PRoW is easy to follow along the field edge. 

The GPX file is 2021_11_08_1256_RagpathWood.gpx

I propose a realignment of the existing route, even though neither route is continuous on the ground. 