Great Island Boat Launch in Old Lyme provides year-round trailered boat access to the Connecticut River estuary via a paved ramp and access road, with 35 parking spaces and seasonal chemical toilets.

Note that water conditions are shallow at low tide, and the site is subject to speed limit regulations (25 mph at night, 30 mph on summer weekends, 45 mph on weekdays).

The launch is part of the Connecticut River Paddlers Trail and offers access to both paddling and fishing opportunities in this scenic estuary area.