In 1992, Ershler met her husband, Phil, a renowned international mountain guide who made the first American ascent of the North Face of Mount Everest. In the years that followed, the Ershlers climbed many mountains together. By the end of 1999 they had climbed six of the Seven Summits together: Mount Kilimanjaro, Africa; Mount Elbrus, Europe; Mount McKinley, North America; Aconcagua, South America; Vinson Massif, Antarctica and Mount Kosciuszko, Australia.