The Silver Moccasin Trail is a 53-mile collection of trails traversing the San Gabriel Mountains. The trail begins at Chantry Flats, north of Arcadia CA, following trails north to Horse Flats where the trail joins the Pacific Crest Trail and ends at Vincent Gap after summiting Mt. Baden-Powell. 

https://en.wikipedia.org/wiki/Silver_Moccasin_Trail

Stunning, all on trails.

https://www.strava.com/activities/2399216304

Once around the lake of Biel. Running next to the lake, on flowy trails and through medival villages.

The Weaverville Basin Trail System (WBTS) was established in 1986 with the intention of circumnavigating the small Gold Rush town of Weaverville, California with an intricate network of 50 miles of diverse trails. Local enthusiasts have poured 100's of hours into creating and maintaining these single track gems. The WBTS project is still ongoing with upcoming plans (2020) for additional expansion and further linkage.

The Gordano Round is a 27-mile (43 km) recreational Long-distance trail, running as a figure of eight around the Gordano Valley near Portishead in North Somerset, England.

The Gordano Round route was first suggested by Jim Dyer of the Gordano Footpath Group in 1983 and walked by four members of the group in 1984. It was adopted by North Somerset Council as a recreational route and now marked on the Ordnance Survey Explorer map 154. The route is described in the book The Gordano Round first published in 2000.