From what I remember, in the 1980s the Otley 12 hour used a finishing circuit that used roads around Cattal, Tockwith and Long Marston. That's from 40 year old memories and following extensive re-routing of the A1 a lot of the roads between Wetherby and Boroughbridge have little resemblance to how they were back then so trying to trace it on Google Maps is a non-starter - a year or so back I rode out to the west side of the A1 to meet up with some guys from West Yorkshire and it was sometime before I clicked that one of the roads we were using actually used to be the A1 on which I rode 25 mile TTs at stupid o'clock on Sunday mornings.