Kristen Kelliher from Hanover, NH, is the youngest female to complete 48 states (17 years, 4 months, and 13 days). She completed on Mount Mansfield on September 11, 2011. The previous record was Danielle Birrer, was 18 years, 4 days old, in 2000. The photo above is on Boundary Peak in 2006. Be sure to check out her gallery which has summit shots from 48 states.