1992: Brandon Wilson and Cheryl Wilson trekked 1,000 km on horseback from Lhasa, Tibet to Kathmandu, Nepal over 40 days. The Tibet border re-opened to travelers a day before their journey began. Their adventure/peace trek is documented in the book Yak Butter Blues.[2] 1994: From October 21 to December 1, 1994, French runners Paul-Eric Bonneau and Bruno Poirier clocked up 2,100 km and 55,000 meters of altitude, crossing from East to West, from Pashupatinagar to Mahakali, traversing in sometimes difficult weather conditions.