Born in Philadelphia and raised in Glenside, Pennsylvania to Grant and Elizabeth Evans, Maddy attended Abington Senior High School where she played four varsity sports, Cross Country, Track, Soccer, and Lacrosse.

She was also a seven-year member of the Eastern Pennsylvania and Region I Olympic Development Program (ODP) teams, with whom she competed internationally.

She was named MVP of the 2009 Kuban Spring Tournament in Russia and captained the 2008 Pennsylvania ODP team that won the Region I Championship.

During her senior year, she served as the team captain and played a pivotal role in leading the Nittany Lions to the College Cup Final.

She made the Penn State record books on August 26, 2011, when she scored the second fastest goal in the program's history.