He had climbed 10 out of 14 eight-thousanders, all without supplementary oxygen. This made him the Bulgarian altitude climber with the highest number of successful ascents of peaks over 8000 meters. He was the first Bulgarian to climb four of those mountains - Gasherbrum I (2009), Kangchenjunga (2014), K2 (2014) and Manaslu (2015).
References[change | change source]
- "Край на операцията... Боян остава завинаги под Шиша Пангма! - Dnes.bg". www.dnes.bg.
- Boyal Petrov, NMNHS
- "The final report puts to rest all speculations surrounding the Boyan Petrov Search Operation", "Dream Wanderlust", 17.05.2018.
- "Boyan Petrov's Team: The Rescue Operation is Over". Novinite.xom. 16 May 2018. Retrieved 17 May 2018.