O'Brien summited Carstensz Pyramid on September 23, 2012, continuing her Seven Summits journey.
On September 23, 2012, Vanessa O'Brien reached the summit of Carstensz Pyramid, the highest peak in Oceania. This climb was crucial in her quest to complete the Seven Summits. Known for its technical climbing routes, Carstensz offered an intricate combination of high-altitude trekking and rock climbing. The achievement not only showcased her versatility as a mountaineer but also her ability to adapt to different climbing environments.