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. 

Variations:

Road: Zurich & Obersee, 93km, gpx "Lake-Zurich-Circum"

Road: Zurich only: ~67km around Lake Zurich only, which is entirely on roads. gpx "road zurich only"

The outer loop of the Back 40 Trails system in Bella Vista, Arkansas. 21 miles, 99% singletrack. The loop starts and ends at mile marker 0 for the Back 40 loop (pictured below) at the Blowing Springs park entrance. 

The Zurich to Zug route connects two major cities in Switzerland and traverses the Albis Mountain Chain, climbing important local peaks such as the Uetliberg and Albishorn. The route covers a total distance of 34km with just over 1,000m of height gain.

Christopher Thomas submitted the route, which covers all of the Rim to Reno Trail with the summit of Mt Rose as an out & back.  About 40 miles: