I make it 178.
There's a hard course, green course which ride half the hard sections & half easy sections & then the Easy route. There was also a separate trial for the ty80's & the other small wheels
I ride on the Green course.
It's been quite mild today & not a great deal of rain so it was almost pleasant for the observers, although we could only raise 12 which was a bit disappointing, so the riders had to self Observe the other 3 sections.
