Notice Not affiliated with the Master Mariners Benevolent Association (MMBA) or any successor organization. v.2026.05
General Overview
Facility 🛶 Full Service Marina Est. Slips ~40 Water Lake Est. Parking ~35 spaces Lot Size Medium (50–150) Lot Type Surface Confidence High

Small marina with multiple finger docks on a lake, unpaved parking area with several vehicles parked near the entrance amid surrounding wooded terrain.

Aerial view of Island Marina Association
Atlantic Coast

Island Marina Association

Alton, NH

Island Marina Association is located in Alton, New Hampshire, in the scenic Lakes Region of New England, specifically on the shores of Lake Winnipesaukee, a large freshwater lake surrounded by forested hills and mountains, though it's not directly on the Atlantic Ocean but part of the broader Atlantic watershed. This marina serves recreational boating and sailing activities on Lake Winnipesaukee, catering to enthusiasts exploring the lake's extensive waterways and islands in a region known for its natural beauty and proximity to the New Hampshire coastline.

Location Alton, Belknap County, New Hampshire
Capacity ~40 slips
Coordinates 43.5393, -71.2857

Nearby Marinas in New Hampshire

Marina Parking & Access Control

Marinas typically need to separate slip holder parking from day-visitor parking, trailer areas, launch ramps, and secure dock access points. Modern facilities use barrier gate systems to enforce these zones automatically — allowing permitted vehicles through via transponder or keycard while logging all access events.