In 2014 Justin Simoni, the “Long Ranger”, bicycled to all 58 of Colorado’s 14,000’ summits, climbed them, then biked to the next in 34+ days. In 2017 he upped the standard and in 60 straight days did the “Highest Hundred” (summits in CO) in the same self-powered, self-supported style. And his background is an artist, not an athlete.
https://www.verzasca.net/articles/176_Via.Alta.della.Verzasca
Many people come from far away to take this 6-day (60km) hike, one of the wildest hikes you will find in Switzerland. Via Alta is a difficult hike, not for beginners. It goes along the ridge separating Val Verzasca from Valle Leventina, offering extraordinary views throughout the whole hike. You can sleep in the mountain huts along the way, the reservations are recommended in the high season.
The Green Rock Trail is a 14.5 mile route (29 miles out-and-back with over 4,000 ft of vert) that connects Rockwoods Range, Greensfelder County Park, and Rockwoods Reservation. This long connector is one of the oldest in the area, dedicated on May 11, 1968 by the Greater St. Louis Area Council of the Boy Scouts of America. The trail showcases several features of Ozark terrain (steep slopes, winding ridge tops, narrow hollows) all less than a hour's drive from downtown STL.
The William Field Memorial State Park Trail, more commonly known as the Hart-Montague Trail, is a linear state park that runs 22.7 miles from Hart, MI to Montague, MI. The state of Michigan has more "rails to trails" trails than any other state, and the Hart-Montague Trail became the first paved rail trail in the state in 1989. The southern terminus is adjacent to the end of Spring Street in Montague where there is a parking lot.