Old Harbor, Columbia Point, and Dorchester Bay
The 'Knowledge Edge' — where the JFK Library, the Massachusetts Archives, and UMass Boston line the waterfront under the shadow of the Rainbow Swash gas tank.
The Ridge That Won the Siege
While the downtown wharves witnessed the occupation, the twin drumlins overlooking Dorchester Bay delivered the strategic masterstroke that ended it. Through the winter of 1775–1776, Continental engineers under Colonel Rufus Putnam quietly stockpiled prefabricated fascines, gabions, and 'chandeliers' — timber frames that could be filled with earth on frozen ground where digging was impossible — behind the low rise of Dorchester Neck, out of sight of the British fleet.
At a Glance
- Route
- Joe Moakley Park → Carson Beach → Columbia Point (JFK Library) → Savin Hill Beach → Rainbow Swash
- Distance
- 3.5 miles
- Duration
- 90 minutes
- Difficulty
- Easy · flat, paved
Getting Here
- T Access
- JFK/UMass (Red Line) + Paul Revere Route 1 shuttle
Amenities
- Admission
- JFK Library paid · Massachusetts Archives free
The Journey
On the south side of the harbor, the shoreline transitions from the hard, industrial edges of the Seaport and South Boston into a more riverine and park-filled landscape. This stretch is defined by the sweeping curve of Dorchester Bay and the prominent peninsula of Columbia Point — itself an engineered drumlin, built up over a former landfill and salt marsh into a broad plateau that now carries the JFK Library, the Massachusetts Archives, and UMass Boston out over the water. Offshore, the shallow flats of Old Harbor and Savin Hill Cove still expose broad mudflats and eelgrass beds at low tide, feeding the horseshoe crabs, herons, and wintering brant that the Dorchester Shores Reservation was set aside to protect.
From Columbia Point the sightlines open across Dorchester Bay to Thompson and Spectacle Islands, and inland toward the twin drumlins of Dorchester Heights — the ridge whose 1776 fortification ended the Siege of Boston and gave this stretch of shoreline its enduring strategic significance.
Old Harbor & Carson Corridor
- 1
Joe Moakley Park
The northern entry to this district — a 57-acre recreational hub with ballfields, courts, and free parking, forming a green link between South Boston neighborhoods and the waterfront.
- 2
Carson Beach
The main high-amenity bathing beach for the region — a primary guarded location in 2026, with a restored bathhouse, bocce courts, snack bar, and kayak rentals.
Columbia Point
- 3
John F. Kennedy Presidential Library and Museum
210 Morrissey Blvd
The major anchor on the point, its striking I. M. Pei architecture overlooking the bay. The grounds feature the Victura, Kennedy's sailboat, displayed outside during the warmer months. Open daily 10 a.m.–5 p.m., paid admission.
jfklibrary.org
- 4
Massachusetts Archives & Commonwealth Museum
220 Morrissey Blvd
Free admission to view historically significant documents that shaped the Commonwealth and the nation.
- 5
Edward M. Kennedy Institute for the U.S. Senate
A digital-heavy museum featuring a full-scale replica of the Senate Chamber. Primarily open for pre-scheduled group visits in 2026.
- 6
UMass Boston Waterfront
A public-facing campus edge with an outdoor sculpture environment and the Harbor Art Gallery.
Dorchester Heights
- 7
Dorchester Heights Overlook
A high glacial drumlin offering a sweeping tactical view over the entire inner harbor, Boston's historic core, and the seaward approaches — the strategic climax of the Siege of Boston.
Echoes of 1776The strategic climax of the Siege of Boston. Overnight on March 4, 1776, American forces executed a flawless logistical feat, hauling heavy artillery captured at Fort Ticonderoga up the frozen slopes using ox teams and hay bales to muffle the sound. When the morning fog cleared, British General Howe looked up at the freshly entrenched cannons and famously remarked, 'The rebels have done more in one night than my whole army would have done in a month,' directly triggering the British evacuation.
Dorchester Shores Reservation
- 8
Savin Hill Beach
Neighborhood-scale, quieter atmosphere. Unguarded in 2026 — swim at your own risk. Suspended directly over the fragile, shifting intertidal salt marshes where the Neponset River estuary meets the open waters of Dorchester Bay. A triumph of modern sustainable engineering that connects Tenean Beach to Morrissey Boulevard, keeping pedestrians elevated above the sensitive marsh ecology while ensuring continuous, low-impact public access to the shoreline.
- 9
Malibu Beach
Small neighborhood beach — unguarded in 2026 and subject to periodic high-bacteria closures; check current DCR advisories before swimming.
- 10
National Grid Gas Tank (Rainbow Swash)
A prominent navigational landmark famously adorned with Corita Kent's 'Rainbow Swash' artwork — visible from most points along this journey.