His major success was in 2013, when he became the first person to ascend the three highest mountains on all seven continents, the so-called "Triple Seven Summits".

For the end of 2011, Stangl planned an expedition to Mount Tyree (4852m) to climb the second highest mountain of Antarctica.

On January 3, 2012, all three expedition members, Stangl, Kammerlander and the Austrian Robert Miller reached the peak of Mount Tyree via the east wall and the northeast ridge.

Late in the evening of July 12, Stangl and his fellow polish climber Adam Bielecki, started their crucial ascent from base camp III (7400m) and reached the peak of the second highest mountain in the world at around 16:00.

The climbers completed the climb successfully without any bottled oxygen and returned to base camp III 23 hours later.

For the completion of the project, Stangl travelled to the Kaukasus region to climb the 5193m high Shkara via the south face on August 23, 2013, together with the Georgian Archil Badriashvili and the Austrian Michael Haidn.

Subsequently, Stangl's success was approved by the chronicler Eberhard Jurgalski, the expert commission of the Guinness World Records and numerous other alpine journalists.

According to one of multiple acknowledged scholarly opinions, the border between Europe and Asia is to be located north of Caucasus, alongside the Kuma–Manych Depression.

Due to potential uncertainties regarding the measurement accuracy of altitudes, Stangl also climbed three additional mountains, Ngga Pulu (2007) und Puncak Trikora (2010) in Oceania, and Rwenzori (Margherita Peak) in Africa (2012).

In 1985, he cycled across the Alps in 28 days, climbing Matterhorn, Mont Blanc, Eiger, Piz Palü, Cevedale, Königsspitze, and Ortler, on the way.

For training matters, Stangl goes for long bicycle treks, for instance cycling from Admont to Gibraltar within 21 days, in 2001.

In course of the Triple Seven Summits project, he rode from Austria to Caucasus and back, carrying the entire expedition luggage.

[23] Christian Stangl now lives in Hall bei Admont, and works as state-approved mountain guide and project manager.