The Charles River Basin
From the Museum of Science to the BU Bridge, a three-mile ribbon of parkland along Boston's front porch — the Hatch Shell, Storrow Lagoon footbridges, and the Cambridge skyline framing sailboats and rowing shells.
One if by Land, Two if by Sea
On the night of April 18, 1775, Paul Revere waited on the Charlestown shore for a signal from the belfry of Old North Church — one lantern if the British marched by land over Boston Neck, two if they crossed the water.
At a Glance
- Route
- Museum of Science → Hatch Shell → Longfellow Bridge → BU Bridge (Esplanade–Cambridge loop)
- Distance
- 7–10 miles loop
- Duration
- 2–3 hours
- Difficulty
- Easy · flat, paved multi-use path
- Best Season
- Year-round · concerts at Hatch Shell in summer
Getting Here
- T Access
- Science Park/West End (Green); Charles/MGH (Red) at Longfellow
- Greenway
- Paul Dudley White Bike Path — 17 miles around the Charles
The Journey
Where Boston's inner harbor narrows toward the mouth of the Charles, the shoreline shifts dramatically — from the working piers of the downtown waterfront to a broad, scenic river basin edged by sprawling parks, historic bridges, and active boathouses. The Harborwalk here connects to an extensive network of riverfront paths on both banks, trading deep-sea ship channels for the graceful movement of sailboats and rowing shells.
For thousands of years this was the Quinobequin, a tidal estuary ringed by extensive salt marshes stewarded by the Massachusett people, with mudflats and eelgrass beds that fed vast populations of shellfish and migrating waterfowl. Twice-daily tides pushed brackish water miles inland to Watertown, and much of what is now the Back Bay and the Esplanade lay beneath shallow saltwater at high tide. The 1910 completion of the Charles River Dam sealed the estuary off from the harbor, converting the salt marshes and tidal flats into today's permanent freshwater basin and setting the stage for the Charles River Reservation.
The Boston Esplanade
On the southern, Boston side of the river, the Charles River Esplanade forms a continuous, three-mile ribbon of parkland — 65 acres of tree-lined paths that weave close to the water's edge, interspersed with larger lawns, playgrounds, and shaded groves.
- 1
Museum of Science
1 Science Park
The eastern anchor of the basin, situated directly atop the Charles River Dam. Terraces and external walkways provide unique vantage points where visitors can look east toward the harbor or west across the wide expanse of the river.
- 2
Hatch Memorial Shell
The park's cultural heart — an iconic outdoor performance venue that hosts the nationally televised Fourth of July celebrations and Boston Pops concerts. A year-round gathering place.
- 3
Storrow Lagoon Footbridges
Multiple pedestrian footbridges span Storrow Drive to link the Back Bay neighborhoods to the water's edge.
The Cambridge Bank
- 4
Longfellow Bridge
Historic granite-piered crossing (1907). Its wide sidewalks serve as essential viewing platforms where the river, the harbor's edge, and the skyline all converge in a single panoramic sightline.
- 5
Dr. Paul Dudley White Bike Path (Memorial Drive)
A multi-use path along Memorial Drive that mirrors the Boston-side experience — a popular corridor for cycling, running, and walking with constant, sweeping views of the Back Bay skyline and the river's active rowing lanes.
- 6
BU Bridge
The western anchor of the basin loop, framing the end of this walk. Continue upstream to loop the Charles as far as Watertown.