The route goes around the Lake Zurich (Zürichsee) & Obersee, 93km. The route is on roads and yellow trail. It's a loop, so you can start/finish anywhere, and go either direction.
A variation is ~67km around Lake Zurich only, which is entirely on roads.
The Variation "Path 84" is ca. 124km and adds significant vertical gain (https://www.schweizmobil.ch/de/wanderland/routen/route-084.html)