Jordan Romero probably can’t wait for people to ask him what he did with his summer. On Saturday, the 13-year-old from Big Bear, California became the youngest climber to reach the top of Mount Everest, beating the previous mark set by a 16-year-old from Nepal. And, once he reached the top, the first thing he did was call his mother. “Mom, I’m calling you from the top of the world,” he said from 29,035 feet, according to the Associated Press. Romero, who scaled Kilimanjaro at age 9, is now just one summit away from scaling the highest peaks on all seven continents, though it could prove the toughest—the Vinson Massif in Antarctica. He and his team, which includes his father, will head there in December.