…you could try this site:

In July 2006, Jacob, Goat and Sean began in Alaska and have since pedaled over 34,000 kilometers, passed through 14 countries, arriving in Ushuaia on January 10, 2010 after 3.5 years of travel.
Instead of riding along the PanAmerican Highway, their unique journey brought them along the dusty, muddy and difficult dirt roads and trails that criss-cross the continental divide – the longest contiguous mountain range in the world; hence their name: Riding the Spine.

MTBs and Xtracycles galore. If nothing else, browse the photo gallery; you’re a hard person if it doesn’t make you want to do it yourself.

[1] blurb snipped from here