The Trollheimen Triangle traverses between three full service huts that form a triangle shape in Trollheimen ("home of the trolls") mountains, located in the middle of Norway. The huts are Gjevilvasshytta, Trollheimshytta and Jøldalshytta. The route can be run starting and ending at any of the three huts, and in any direction.

Between Trollheimshytta and Jøldalshytta, there are three trails: Svartådalen (the valley, fastest), Geithetta (over a mountain ridge) and Trollhetta (over a larger mountain, most difficult). The main route is over Geithetta.

https://www.varldsarvsleden.nu/

A road course from the statue of Paavo Nurmi in Helsinki (where Nurmi lived last years of his life) to the statue of Paavo Nurmi in Turku (which was Nurmi's hometown and where he lived when he was in his peak form and took nine Olympic gold medals 1920-28). The one-way route follows a road number 110 (an old main highway from Helsinki to Turku) and it is approx 165 km long (not officially measured, based on data from several GPS-watches).

The Heritage Trail is a former rail line converted to 29 miles of recreational trail from Dyersville, Iowa (of Field of Dreams fame) to Dubuque. Over the course of this rural trail, the terrain changes from open fields to river valleys to bluffs. The trail traverses the Maquoketa river multiple times via bridges, and wildlife, such as rabbits, turkey, deer, hawks, and eagles, can frequently be seen.

With several access points throughout the park, you're likely to constantly encounter new hikers along this circular trail.  It travels partly along a high bluff and partly through a low wetland. It offers tremendous views of Georgian Bay, and during the fall the views can be spectacular.  The trail loop is well marked and maintained.