I understand that people ride crazy stuff. I just believe that 70% is obscene for the middle of the scale. Go and measure - do some trig - 70% slopes aren't out there on many trails at all.

I think part of the issue too is distance. A slope that at the top 5' or so is 70%+ but flattens out is not, imho, a 70% slope.

Again, it was a nit I was picking.

Austin trails:
Barton Creek Greebelt : S0 with some S1. Side trails up to S3
Emma Long: S3
Forest Ridge: S2, but closed these days
Walnut Creek: S0 and S1
Muleshoe: S0 with some S1
Flat Rock Ranch, 18mi loop: S1 with some S2 drops.

Emma Long was my favorite, and I need to find one like it out here...