Tomo Česen is a Slovenian mountaineer born in 1959; he specialises in solo ascents in the Alps and the Himalayas.

At the age of 26, he reported that he had enchained the three Great north faces of the Alps

Great north faces of the Alps

In mountaineering, the six great north faces of the Alps are known for their difficulty and great height. They are:*Cima Grande di Lavaredo*Eiger*Grandes Jorasses*Matterhorn*Petit Dru*Piz Badile...

, becoming the first person to do so solo in Winter.

He has claimed a number of other notable mountaineering achievements, but some of his claimed ascents have often met with skepticism from others in the mountaineering community. The most controversial was his 1990 solo ascent of Lhotse

Lhotse

Lhotse is the fourth highest mountain on Earth and is connected to Everest via the South Col. In addition to the main summit at 8,516 metres above sea level, Lhotse Middle is and Lhotse Shar is...

, the 4th highest mountain in the world. To verify his ascent, Česen produced a photo of the west Cwm of Everest shot from Lhotse, which later turned out not to belong to him.

One of the more popular routes on K2

K2

K2 is the second-highest mountain on Earth, after Mount Everest...

is named after him (the Cesen Route) after he soloed it in 1986.