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.

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.



Dogs: Yes

Boat Ramp: No

ADA Access: No

Scenic Views: Yes

Waterbody/Watershed: South River