A guy from Sweden rode his bicycle to Nepal, climbed Everest alone without Sherpas or bottled oxygen, then cycled back to Sweden again.
For his 1996 ascent, Göran Kropp left Stockholm on October 16, 1995, on a specially-designed bicycle with 108 kg (240 lb) of gear and food. He traveled 8,000 miles on the bicycle and arrived at Everest Base Camp in April 1996. Following a meeting of all of the Everest expeditions on the mountain at the time, it was agreed that Kropp would attempt to summit first.
On May 3, Kropp climbed through thigh-deep snow and reached a point 300 feet from the summit. However, he decided to turn around because it was too late in the day and if he continued, he would be descending in the dark. While Kropp recovered from the ordeal at base camp, the 1996 Everest Disaster unfolded. He helped bring medicine up the mountain. Three weeks later, on May 23, he again tackled the mountain, this time successfully summitting without extra oxygen support.
He then cycled part of the way back home. He returned to Everest in 1999 with his girlfriend Renata Chlumska to undertake a cleanup, during which they removed 25 discarded canisters from the mountain. They also successfully summited together.