Things to Do on Mason's Island in Mystic This Season
The bridge traffic thins first. By the third week of August the day-trippers have started rotating out of Mystic proper, and the two-lane causeway to Mason's Island loses its afternoon queue. What replaces it is quieter, and if you already live here you know the shape of it: race committees setting marks off the south lawn, dahlia beds coming into full color a mile down the road, and mornings cool enough to justify a real breakfast at the marina.
The thesis of this piece, for anyone who has lived on Chippachaug for more than a season, will not be a surprise. It is worth naming anyway. The best stretch of the year on Mason's Island is not July. It is the six-week hinge from mid-August through late September, when the island's split geography, its private south and public north, briefly aligns around events that only happen once a year and a public garden that only peaks for a month.
Most guides describe Mason's Island as a single place. Residents know it functions as two. The Mason's Island Marina and the Mystic River Marina sit on the north, public, end of the island, while the southern half is gated at 526 Masons Island Rd, and access to the Masons Island Yacht Club and further onto Enders Island is only by private road.
That split shapes late summer more than any other season. The north end is where the fishing, the marina breakfasts, and the causeway walkers live. The south end is where the regatta committees, the club juniors, and the causeway to Enders operate. The island as a whole is not large. It runs roughly 1.2 miles north to south and 0.8 miles east to west, all sitting on solid granite bedrock, which is why a quarry supplying rough granite for breakwaters, including work at Newport, Rhode Island, once operated at Pine Hill on the northwestern side of the island. A short drive covers the entire compass.
What changes in late summer is that both halves get busy for the same six weeks, for different reasons.
Three fixed dates anchor the season. If you sail, you already have them. If you don't, they still explain why the water looks the way it does on those weekends.
The Invitational is the one visible from most of the island's southeast shoreline. The club sits on the southeast side of Masons Island and looks out on one of the most scenic tri-state waterfront vistas in New England, with Fishers Island, Watch Hill, and the historic Borough of Stonington all within a few miles and within sight. If you have never watched an Island Cup leg from a lawn on Cormorant or Egret, this is the year.
Junior racing anchors the earlier part of the calendar. The 2026 MIYC Opti Regatta is scheduled for Tuesday, July 28th, with all junior Opti sailors from ECSA clubs invited to participate, which by August has trained a fleet of ten-year-olds capable of taking the club Optis out on their own after supper. Late August is when the kids look most competent and the adults look most tired.
Two miles from the yacht club, across a second causeway at the south tip of the island, the calendar shifts from sailing to horticulture. Enders Island is an 11-acre island off the coast of Mystic, connected to the mainland by a short causeway, where from mid-August to mid-September hundreds of dahlias bloom in the crisp island air. It is recognized as one of the largest dahlia displays in New England.
The bloom window is the point. Peak color lands almost exactly on regatta weekend and holds through Labor Day. This is not a garden that peaks in July with the rest of the shoreline. It peaks now, on purpose, because the Enders family planted it that way when they still lived in the house.
A few practical things to know if you have not walked the grounds recently. Enders Island welcomes everyone to enjoy the grounds whether or not they are participating in a program, with visitor parking provided immediately to the left of the causeway, and a gift store featuring homemade jams, jellies, artwork, and apparel located in the center of the island in the lobby of St. Michael's Hall. Access has been settled and stable since last spring: the long-running case was settled without trial in March 2025, largely in favor of St. Edmund of Connecticut, with the settlement requiring the society to post signage making it clear Enders Island is not open to the public as a park, and to pay the Masons Island Property Owners' Association $10,000 annually for access road upkeep. Translation for residents: the road is maintained, the grounds remain open for prayer and reflection, and the parking lot to the left of the causeway is where you go.
The grounds themselves are worth an hour even if you have walked them a dozen times. A 360° ocean view, walking gardens, a Seaside Chapel, an outdoor Stations of the Cross, and the Enders Mansion and Catholic Chapel of Our Lady of the Assumption, which houses the incorrupt arm of St. Edmund of Canterbury (1175-1240), sit within the eleven acres. The Chapel of Our Lady of the Assumption is constructed of Connecticut fieldstone interlocked with stones from Marian Shrines around the world.
There is also a working art school on the island most residents underuse. The Sacred Art Institute at Enders Island, founded in 1995, offers classes and workshops to the public in iconography, stained glass, mosaics, calligraphy, wood-carving and manuscript illumination, along with workshops in Gregorian chant with live recordings performed in the onsite Chapel of Our Lady of the Assumption. If you have ever thought about taking a fall class in mosaics or calligraphy, the fall schedule opens in this same window.
Back at the north end, the season has its own less-programmed version of the same thing.
Kitchen Little, located at the marina on Mason's Island, a short hop across the bridge from downtown Mystic, remains a local favorite for its bountiful food. The move in late August is to go on a weekday. The July line collapses once school starts, and the counter reopens to the people it was built for.
Fishing on the mainland causeway comes back into range at the same time. Fishing is permitted from the causeway connecting Mason's Island to Mystic, and common species anglers catch on the Mystic River include striped bass, bluefish and scup. The scup run is the underrated one. It fills a bucket in an hour if the tide is right and asks very little of your gear.
The working end of the marina is worth knowing. Mason's Island Marina runs 120 total slips with 6 transient, floating docks, and 20 moorings, with 6.0 feet of approach depth, and its position on the north side of Masons Island in the Mystic River, south of all bridges, gives easy access to Long Island Sound, Fishers Island, and Block Island. "South of all bridges" is the phrase that matters. It is why anyone with a keeled boat keeps it here rather than upriver.
Between the two ends sits the part of the island residents forget to use. A 47-acre nature preserve sits in about the middle of the island, featuring a large salt marsh with surrounding woods that can be accessed by multiple trails. There is also a large fresh water pond at the southern end of the island that was formerly used for harvesting ice.
Late August into September is when the marsh is at its best. The greenheads are gone, the light is longer at the wrong end of the day, and the salt hay along the trail edges has started to shift color. It is a fifteen-minute loop if you push, an hour if you don't.
For anyone new to the island, one piece of context worth carrying. Mason's Island, from the Algonquin Chippachaug meaning "a separated place," is an inhabited island at the mouth of the Mystic River in Stonington. It was named after Major John Mason and remained in the Mason family for over 250 years, from 1651 to 1913, after which the Allyn family have been stewards of it, with most of the island owned by the Mason's Island Company and regulated by property deeds under the Mason's Island Property Owners Association. The MIPOA governance is what keeps the roads, the association beaches, and the yacht-club membership rules working the way they do. It also explains why so many of the seasonal events are opt-in rather than town-run. If you own here and have not read your deed in a while, late summer is a good time to.
Put the pieces together and the argument for this stretch of the year is straightforward. Two regattas visible from your own shoreline. A dahlia garden at peak bloom a mile away. A breakfast counter that is finally usable on a Saturday. A causeway holding stripers, blues, and scup. A salt marsh no one is walking. And a full month before the summer moorings come out.
If you have been in the house for years, you already know this. If this is your first full August as an owner, the calendar above is the one to build the next four weekends around.
When the season winds down and you start thinking about what your home is actually worth in a shoulder-season market that behaves nothing like July, the team at Donna Sormanti-Saglio is here to walk the island with you. Get Your Free Home Valuation whenever the timing is right.
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