https://dnr.wisconsin.gov/topic/parks/elroysparta

The Elroy Sparta trail is a beautiful trail through central Wisconsin.  It is a mostly crushed limestone multi-use trail that is popular for bikes.  It is a former train route that has long train tunnels where bikers & runners need headlamps.  

This route was designed as a fundraising challenge for the mentoring charity Chapter2 (http://www.chapter2.org.uk/). Completed within 24 hours, it is a gruelling hike through England’s highest mountains leading you from Honister Pass to St John’s in the Vale. The route incorporates 24 Lakeland peaks above 2000 feet with 4 peaks above 3000 feet.

The Okumusashi Long Trail 105K is a trail running/hiking trail in the Hanno and Okumusashi areas of Saitama Prefecture. This beautiful and difficult loop connects trails through the historical areas and mountain passes of the region. The trail map, markers, and maintenance is a result of the efforts between local government groups and the Tokyo Trail Running Club.

Route Facebook link

The route from Del Valle Regional Park to the Sunol Wilderness Regional Preserve is the most noteworthy portion of the Ohlone Wilderness Trail, including unparalleled climbs and vistas.  It is as beautiful as it is challenging.