In 2013, Marty and Denali Schmidt summitted Broad Peak, an 8,000 meter climb in Pakistan before attempting to summit K2. Marty, Denali and Mike Horn participated in a rescue attempt on Broad Peak for the three young Iranian climbers in July 2013, but they were unsuccessful and the Iranian climbers were never found. After this rescue work, Marty, Denali and other climbers started on their ascent of K2. However, they were advised by expedition sherpas that conditions were too dangerous to attempt to climb higher at that time. All the other teams and climbers turned around except for Marty who made the decision to continue on alone with his son, Denali. Marty and Denali climbed toward K2's Camp 3, but went missing after an avalanche hit their camp on 26 July; Marty Schmidt's daughter, Sequoia Di Angelo, confirmed their deaths via Twitter on 29 July 2013.