Lake Hayward is a natural spring-fed lake situated just north of Devil's Hopyard State Park in the northeastern corner of East Haddam, Connecticut, and is bordered by the towns of Colchester and Salem. Lake Hayward is approximately 1.5 miles (2.4 km) long and 0.5 miles (0.8 km) wide. Its surface area is 174 acres (70 ha), and its elevation is 348 feet (106 m) above sea level. The lake has an average depth of 11 feet (3.4 m) and a maximum depth of 37 feet (11 m).