The Brazeau Loop in Jasper National Park is a demanding, high elevation trail that crosses three mountain passes. It is a lollipop loop, beginning and ending at the Nigel Pass trailhead.

https://www.pc.gc.ca/en/pn-np/ab/jasper/activ/passez-stay/arrierepays-backcountry/sugg-sentiers_trip-ideas/Brazeau

The length of the GR651, from Beduer to Bouzies. Beautiful trails past ancient castles, cliffs, valleys and villages. Part of the St James pilgrim route to Compostella.

In the early 1800s the Kennet and Avon Canal provided an important direct trade route between London and Bristol. Today the waterway weaves its way through the rolling chalk contours of the North Wessex Downs to the southern edge of the Cotswolds, passing vibrant towns and cities as well as picture-postcard villages with thatched cottages, ancient churches and cosy pubs.

The Laugavegur Trail is a 34 mile (55 km) one-way trail between Landmannalaugar and Thorsmork. On average hikers usually do it in 3-4 days. 

Iceland's Laugavegur Trail is likely to be one of the most surreal hiking experiences you'll ever encounter. The scenery here is otherworldly. Sometimes so much so that it is hard to imagine how it came to appear on earth. It is a geological feast, with the main ingredient in this recipe being the volcanic underbelly of this little island.