The Bhutan Snowman Trek (aka Lunana Trek) is a 216 mile route with over 11 passes above 16,000 feet. The hiking route follows the spine of the Himalayas between Bhutan and Tibet in the Lunana region.
The route starts in Paro in western Bhutan and is a major north-south thoroughfare.
Note: the Bhutan government requires all foreign trekers to have a tour company guide and pay a daily fee ($200USD in 2008).
Overall, Bhutan Snowman Trek is the 1st most popular hiking trail of all 4 hikes in Bhutan.