Complex sentence: Connecticut's State Board of Fisheries and Game established the Salmon River State Forest in 1934 and has continued to enlarge the forest to its present size of roughly 6,000 acres in Hebron, Marlborough, Colchester, East Haddam and East Hampton.
Split into simpler sentences: Connecticut's State Board of Fisheries and Game established the Salmon River State Forest in 1934. Subsequent acquisitions by the state have enlarged the forest to its present size of roughly 6,000 acres throughout Hebron, Marlborough, Colchester, East Haddam and East Hampton.