Loïc Gerber proposed this 280km scenic tour of the Swiss Canton de Vaud:

The traversee (crossing) of an entire area in Switzerland which is called « Canton de Vaud ». The Route begins to the east and finishes to the west and goes by the north (the route make a triangle form). The Route is divided in 4 different parts : 1. High Mountains, Flat, Medium Mountains, Lake (Préalpds Vaudoises, Plateau, Jura Vaudois, Lac Léman).

Der Donauberglandweg ist ein etwa 57 Kilometer langer Prädikatswanderweg mit über 4.500 Höhenmetern vom Lemberg bis zum Kloster Beuron. Er führt entlang des Albtraufs über die südwestliche Schwäbische Alb und durch das Obere Donautal. Er liegt in einem Dreieck zwischen Sigmaringen, Tuttlingen und Rottweil in Baden-Württemberg.
https://de.m.wikipedia.org/wiki/Donauberglandweg

The Mary Towneley Loop is a 47-mile (76 km) circular route that forms part of the Pennine Bridleway National Trail, along the borders of Lancashire and Yorkshire. The loop was opened in 2002, the first section of the Pennine Bridleway.[1]

It is named in memory of Mary, Lady Towneley, who drew attention to the poor state of England's bridleways and the need for a long-distance route for horse-riders by riding with two friends in September 1986 from Hexham in Northumberland to Ashbourne in Derbyshire. She died in 2001.

Starts at Storlien and ends at Högfjällshotellet in Sälen. Dalarna.  340km.