Bourne Island Lagoon

Owned By: Town of Marshfield

Marshfield Conservation owns Bourne Island, a 6 acres of upland surrounded by 75 acres of salt marsh. There is a large lagoon with access from the South River, which is a perfect place for paddlers to take a break. Water access only.


While paddling on the South River, it’s easy to miss the Bourne Island Lagoon, unless you know where to look. We recommend carrying a map. What appears to be a marsh creek opens up into a large round pond-like area, surrounded primarily by salt marsh.

In 1964, the Southport Civic Association gifted the Town of Marshfield with 22 acres of marshland close to this site, the first parcel acquired for Open Space.

Trail Description

This Marshfield Conservation property used to include a trail that led along a narrow strip of upland, through the marsh, to an overlook of the lagoon. Unfortunately, due to vandalism, the trail — which has become significantly overgrown with briers — is closed to the public until further notice.

Habitats and Wildlife

The Bourne Island Lagoon is the perfect place to pause while paddling a canoe or kayak. Let yourself rest, while floating in the still water, and admire the birds who make their home along the river and marsh. There is a stand of cedars to one side as you enter the lagoon. Look for the otter den at the water’s edge.

42.10245, -70.688385

Historic Site: No

Park: No

Beach: No

Boat Launch: No

Lifeguards: No

Size: 81 acres

Hours: Dawn to Dusk

Parking: No public parking available.

Cost: Free

Trail Difficulty: No trails.


Geocache location.

Dogs: Yes

Boat Ramp: No

ADA Access: No

Scenic Views: Yes

Waterbody/Watershed: South River