Hill has two brothers, Zach and Jake, and played indoor soccer with them on a team coached by her father, Mike.
ROSO Soccer Club
Hill played youth soccer from age 4 until U14 with ROSO S.C.. She started in the town recreation program and at age 11 started playing travel soccer with the ROSO U13 Girls travel team in 2005 and played with ROSO until 2008.
Seacoast United
Hill played youth soccer for Seacoast United from their U-14 program through U-18, winning Super Y-League national championships in 2009 and 2011 and playing for the WPSLSeacoast United Phantoms in 2012 and 2013.
Hill was a two-time semi-finalist for the MAC Hermann Trophy as a forward for the University of Connecticut Huskies, in 2015 and 2016. Hill was a 1st Team NSCAA All-American in 2015 and a 2nd team All-American in 2016. She scored 61 goals in 89 collegiate appearances, ranking second all-time in career goals and 4th all time in points with 140 among University of Connecticut women's soccer players. She was the American Athletic Conferencemidfielder of the year in 2016 and Offensive player of the year in 2015 & 2014.
selected Hill with the 14th pick in the 2017 NWSL College Draft and subsequently traded her to the Orlando Pride in exchange for first- and fourth-round picks in the 2018 NWSL College Draft. The Pride signed Hill in May 2017 after her college graduation, and she earned her first start on June 3. Hill scored her first professional goal on June 28, 2017, a game-winner against Sky Blue FC. She finished her rookie season with three goals, one assist from only 14 games, 8 of which were starts. After her contract option exercised for 2018, Hill went on to play 21 games in 2018, but a nagging injury lead to her starting only seven of them. She scored four goals tying Marta as third best for the Pride. Hill had a new contract offer given at the end of the 2018 season.
On October 19, 2017, Hill joined Australian club Perth Glory on loan for the 2017–18 W-League season. During her first season at Perth she finished with 9 goals, the third-most goals in the league and 6 assists, the most assists in the league. She re-signed a loan agreement for 2018–2019 and ended the season with a further 6 goals as the team finished runners up in the Grand Final.
Chicago Red Stars, 2020–present
On January 16, 2020, Orlando traded Hill to the Chicago Red Stars during the 2020 NWSL College Draft along with a third-round, Orlando's natural first-round selection in the 2021 NWSL College Draft and an undisclosed amount of allocation money in exchange for the No. 3 overall selection and a third-round pick in the 2020 draft.