Outside of the Alps, Boulaz traveled often within the Himalaya, the Caucasus and the Sahara. In 1959, she was a member of the all-female expedition to Cho Oyu where Claude Kogan, Claudine van der Straten-Ponthoz and three Sherpas died during an avalanche. In 1977, she was the first to climb a new route in the Aïr Mountains of the Sahara, which she named Tour Loulou. She was made an honorary member of the Swiss Alpine Club, even though the club did not allow women to become members at the time, as well as holding honorary membership of the Ladies' Alpine Club and the Alpine Club.