Owned By: Town of Marshfield
Look for the kiosk in the parking area for the CVS at 1880 Ocean Street and follow the Rail Trail beside it 0.15 miles to the Francis Keville Bridge, a beautiful spot overlooking the South River and its marshes. A ramp and float provide seasonal access for small non-motorized boats.
Tide Math: High tide at the Francis Keville Footbridge is about 3-3.5 hours after the Boston high tide.
Established in 2017 by the Town of Marshfield, Goodwill Hunters, and NSRWA, this launch site for canoes, kayaks, SUPs and other small boats provides access to the upper navigable portion of the South River. The Keville Footbridge was constructed in 2001. It provides a vital link between Marshfield's downtown area and the Rail Trail/Bridle Trail that extends for 3 miles across town.
Even if you’re not interested in launching a boat from the Keville Footbridge, it’s worth visiting. Goodwill Hunters installed a granite bench at the water’s edge – a tribute to the late Drew and Anjuli Hunter -- and the view from there is really something.
The Francis Keville Footbridge is part of a longer-term plan for the Town of Marshfield -- connecting all of the green spaces along the South River in the downtown area to create a South River Greenway. This would pull together Veterans Memorial Park, South River Park, Pratt Farm, the Keville Footbridge, Dandelion Park and the Rail Trail/Bridle Trail.
To access the Keville Footbridge, follow the wide 0.15-mile portion of the Rail Trail that extends behind the CVS on Ocean Street, adjacent to Dandelion Park. There is also a 0.25-mile section of the Rail Trail that originates on South River Street. Paddlers should be aware that launching a boat here requires carrying it first -- a bit of a distance. It’s worth it, though!There is a gate in the middle of the bridge that opens onto a tall metal ramp. The ramp is steep, but it has railings and a non-slip walkway . . . and it is wide enough to accommodate a person carrying a kayak. The ramp leads down to a wooden float, which sits on the water’s surface.
Once you get your boat on the water, you are in for a treat. This is a quiet section of the river – bordered on both sides by salt marsh. Those familiar with the lower portion of South River at Humarock and Rexhame will find this section to have significantly less traffic. Especially in the summer, when the reeds have grown tall, it’s hard to believe that civilization is close-by.
After passing through the center of Marshfield, the river tucks back into the marshes. One can view it remotely from various locations along South River Street, and in the Southport and Rexhame neighborhoods. Downstream from there, it completely changes character. Its final three miles, along the barrier beach of Humarock, are very much out-in-the-open.
One of the many nice things about the lower portion of the South River is that it is wide and deep enough to be navigable at any tide. The upper portion is another story. You can still launch a canoe or kayak from the Keville Footbridge at low tide, but you are likely to encounter some obstacles as you proceed. (With a SUP, you should be able to glide around or over even the shallowest sections). For example: sandbars! Thus, be sure to consult a tide chart before you go, and bear in mind that when it’s high tide at the ocean, it will be another 3-4 hours before it’s high tide at the Keville Bridge. The height of the tide itself, and the amount of rainfall in the days and weeks prior, also affect water level.
Heading upstream, the South River remains navigable by canoe or kayak at some tides between the Keville Bridge and Veterans' Memorial Park, however it may not be accessible at all tides due to bridge clearance at Willow Street and low water levels.
Habitats and Wildlife
At the Keville Footbridge, you’re likely to see all sorts of wildlife – turtles sunning, river otters playing, any number of fish and fowl going about their daily routines. Look for shorebirds, gulls, hawks, cormorants, egrets, heron, and osprey -- all of which will become more common as you head downstream through the marshes.
The South River originates deep in Duxbury. Its source is in the Round Pond area, and from there it winds unobtrusively through the woods for several miles. Although one can view it from Route 3, and also from both the South River Bogs and Camp Wing conservation areas, it remains a narrow and mostly un-navigable stream until it makes its first “public” appearance at Veterans Memorial Park in Marshfield. From there it flows under Route 3A, through South River Park, and behind the playground of South River School, emerging again at Willow Street. But due to fences, dense vegetation, traffic, and relative navigability none of these are ideal places to access the river by boat.Here at the Keville Bridge the river is wider, and navigable at most tides. Its course continues as it winds through the marshes, running parallel to Route 139, all the way to Rexhame. From there the river turns northward. It flows for 3 miles between Humarock and the mainland to Fourth Cliff, where it joins the North River at its outlet to the sea.
Historic Site: No
Boat Launch: Yes
Hours: Dawn to Dusk
Parking: Drop off your boat via the parking lot for the CVS. Park in Library Plaza.
Trail Difficulty: Easy
Facilities: Canoe & Kayak launch, float, benches, informational kiosk.
Boat Ramp: No
ADA Access: Yes
Scenic Views: Yes