The Continental Divide Trail runs for 3,100+ miles from Mexico to Canada, along you guessed it, the Continental Divide. The Continental Divide Trail Alliance (CDTA) was formed in 1995 to aid in the completion of the trail, and help maintain the miles already blazed. In 2007, Francis Tapon round-tripped the CDT, by first hiking from Mexico to Canada, then back. The trip took him 6 months to finish, and rounded out his Triple-Crown. There is a similar mountain bike trail through the Great Divide Basin spanning from Banff, Canada, to Mexico. Check out the trailer for Ride the Divide, a documentary about the "world's toughest mountain bike race". Sheesh.