Alumni Field is a baseball field located in Keene, New Hampshire, United States. 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 Swampbats are an active part of Keene’s community, including participating in the Summer Reading Program, Baseball Buddies Program, and Fourth of July Fireworks.