For boys varsity sports, Landmark maintains membership in the Eastern Independent League (EIL). The development and integrity of Landmark's athletic program is enhanced through this membership, and the opportunities for our athletes have expanded over the years to better meet their needs. EIL membership for our boys include the following schools: Bancroft School, Beaver Country Day School, Berwick Academy, Chapel Hill Chauncy Hall (wrestling only), Concord Academy, Lexington Christian Academy, Pingree School, and Portsmouth Abbey School.
Landmark female athletes compete in the Independent Girls Conference (IGC). This conference also values the principles of sportsmanship and adheres to a similar mission statement as Landmark’s. Giving students the opportunity to compete in leagues that recognize sportsmanship, fair play, and healthy competition strengthens their self-image and enhances their growth. Members of the IGC include Brimmer & May, Cambridge School of Weston, Chapel Hill - Chauncy Hall, Gann Academy, Montrose School, and Waring School.
Both leagues are full members of the New England Preparatory School Athletic Council, also known as NEPSAC. Landmark maintains membership in NEPSAC’s District III.