deep river marina is located on the connecticut river in deep river, connecticut. the marina is on a calm stretch of tidal fresh water off the main channel and is well protected from passing wakes and foul weather. deep river is well sited, above popular essex and below hartford. its only neighbor is the essex valley railroad, which makes several tourist runs a day along the marina's property line. within are 5 other marinas and boatyards, with a combined boat population just under 1,000. the boating season runs from mid-april to mid-november. the original boatyard was built in 1955.