Alumni Field is a baseball field located in Keene, New Hampshire, USA. The field, located on Arch Street, was constructed in 1948 and has served as the home of the Keene Swamp Bats of the New England Collegiate Baseball League since the 1997 NECBL season. The field is part of the athletic facilities at Keene High School and is owned by the Alumni Association. The football, soccer, and track & field teams of Keene High School also use the facility.