Alberto Zerain Berasategi (20 August 1961 - 24 June 2017) was a Spanish mountaineer. He is best known as a solo alpinist and the first person to summit K2 during the 2008 K2 Disaster on 1 August. Zerain summited the mountain solo from Camp III and successfully descended before the series of events that led to the deaths of 11 climbers on 2 August 2008. In his lifetime, he climbed at least 7 eight-thousanders.