Pat was a founding member of the Denton Women's Interracial Fellowship (DWIF) and served as a co-chair during the 1960s. She moved to Denton in 1957 to study education at Texas Woman’s University, later earning an English degree from NTSU. She was an active community member, participating in the Women’s Political Caucus, League of Women Voters, and the Denton Christian Preschool. She ran for city council in 1977, and served as the chair of the Denton Parks and Recreation Board.
Pat taught at Denton ISD for 37 years, often as a sought-after substitute teacher, tutored special needs students, mentored at-risk students, and served on the PTA. Denton’s Pat Hagan Cheek Middle School is named in her honor. After retirement, Pat remained active in numerous organizations, including Denton County Friends of the Family, the Salvation Army, the Greater Denton Arts Council, the Liberal Ladies Luncheon League, and the Grandparents in Public Schools program.