Alicia Hempleman-Adams took 10 days to walk and ski 150 miles across Baffin Island in north-east Canada.
Her father, David, 48, who won fame by reaching both the South and North Poles on foot, setting a series of air-balloon records and climbing the highest mountain on every continent, had previously taken 11 days.
"It's a double-edged sword," he said. "I'm immensely proud of what she has achieved, but a bit miffed she has beaten my time," he told Reuters from a hotel in Canada.
Alicia and her three companions had to battle a wind chill factor of minus 40C, thin ice and open water along the trek.
But this will not necessarily mean the start of a career in exploration, she said. "I want to try other things first."
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Quite amazing for a 15 year old.