Although already a tourist attraction, in June 1879 two recreation areas were developed on privately-held land. These included a boating operation on the Wilcox property at the west side of Green Lake, and Tremain Park on the east side, with reception cottage, recreation rooms and a large dancing floor. A dock, picnic tables, and stables followed, and at a later date a merry-go-round and bandstand were installed. Although it initially was a source of "considerable complaint" that men and boys were permitted to bathe at Tremain Park "at hours when the exposure is very offensive to visitors," ("Weekly Recorder," July 24, 1879), the park gained in popularity. Steamboats plied the Erie Canal from Syracuse with regular stops along the way to bring school clubs, Sunday school classes and other groups to Green Lake landing. At times these groups were entertained enroute by the Fayetteville cornet band. In June 1880, the steamer M. S. Price left Syracuse and arrived at the landing in about two hours where its party took their tin pails, a cook stove, tea kettle and other paraphernalia to the picnic area, ate chicken pie, biscuits, and fresh strawberries, then topped off the occasion with an after-dinner rowboat ride at $.25 an hour.
In 1928, the New York State Parks Commission purchased its initial 500 acres, and added to its holdings at a later date. Presently Green Lake Park contains a swimming area and also has golfing, boating, fishing, and picnic facilities. Camping sites and numerous hiking trails are also available.
Round Lake and Green Lake are connected by a small stream, and for centuries have elicited considerable geological interest. Round Lake has since become a Registered Natural Landmark of the U. S. National Park Service.