Middlesex County topographic maps

Average elevation: 61 m

Average elevation: 95 m

Average elevation: 43 m

On New Year's Day, 1984, Kevin Walsh took off from Minute Man Air Field with 57 helium balloons tied to a lawn chair, later descending by parachute. He was cited with four violations of FAA regulations and fined $4,000 ($10,922.66 adjusted for inflation to 2022). He reached an altitude of 9,000 feet (2,700 m).

Average elevation: 72 m

Average elevation: 38 m