Schmidt summitted Ama Dablam and attempted Lhotse in the same season. Schmidt led two successful expeditions to Mount Everest guiding for the Canada-based company Peak Freaks in 2012 and 2013. In 2012, he became the oldest New Zealander to summit Everest at the age of 51. He summitted Everest again in May 2013. Marty and Denali Schmidt created a new route on Denali in 2011. They named this route "Dad and Son". 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. Schmidt climbed and guided clients on all of the Seven Summits—the highest mountains on each continent—and climbed five of the world's fourteen 8,000 meter peaks. Throughout his career, he climbed and summited - Denali 29 times, Aconcagua 34 times (five different routes including the south face), Mount Cook 26 times, Mount Aspiring 16 times, Mount Tasman 7 times and Mount Everest two times. Schmidt was a member of the American Alpine Guides and became a member of the New Zealand Alpine guides in 2003. Peter Hillary noted the loss of Schmidt and remarked on his enthusiasm. The place of his residency, Christchurch, New Zealand, held a memorial service for Schmidt and his son at the Horticultural Society Hall in Hagley Park. Schmidt's daughter, Sequoia, travelleled to Pakistan and K2 to search for the remains of her father and brother in 2015. Her book, "Journey of Heart-A Sojourn to K2", was a finalist for the International Book Award for Non-Fiction in 2016.