The super-classic, 100+ km Paine Circuit is the premier backpacking route in Torres del Paine National Park, Chile. It traverses some of the most spectacular scenery on Earth. The much shorter "W" is probably done more often as it covers much of the most best scenery of the Circuit plus allows close up views of the amazing towers & spires for which the Park is justly famous.

Note that there seem to have been some new regulations put in place that make it much harder to legally attempt an FKT, as reported by Sunny Stroeer (2/9/2018):

The Dientes de Navarino is an amazing route on Isla Navarino in Tierra Del Fuego, Chile. It is 54 km through some of the most rugged country you are ever likely to traverse. It is also considered the southern-most trek in the world, and from one place you can view Cape Horn. Wow!

https://www.bookmundi.com/t/dientes-de-navarino-trek-everything-you-need-to-know

https://www.tourismpei.com/pei-confederation-trail

When Prince Edward Island's railway was abandoned in 1989 Islanders were quick to notice a unique opportunity. The idea of a tip-to-tip shared use walking and cycling trail in the summer and a snowmobile trail in the winter was born. With beautiful rolling hill scenery, quaint villages and broad bay seascapes, the Confederation Trail is Prince Edward Island's portion of the Trans Canada Trail.

West Lion (5408') is a popular but fairly stiff climb near Vancouver.  We have a couple of Variations so far.  The track on our map shows the NE Buttress and "Tourist" routes (Nick Elson's track).

Dave Merrick posted the Variation beginning and ending at Lions Gate Bridge: