After the long night, I was looking for a small tour. I read on www.singletrailzh.ch about the Tösstal-Acht. The part up the Hutziker Tobel to Schauenberg and then down sounded perfect. So I took the train to Kollbrunn and started the tour there. But, I could have taken the train to Turbenthal instead.
At Schauenberg I met some local bikers, and they took me down a different Single Trail.