Route 25A did not begin as a road. It began as a path — a colonial-era corridor worn into the North Shore soil by ox carts, post riders, and eventually the boots of men who were deciding the fate of a new nation. The route originated in the early 1700s and became a major artery of Long Island history. Long before traffic signals and strip malls interrupted its rhythm, this road passed through one of the most consequential stretches of American geography. Today, it runs 73 miles from western Queens to Calverton, and for those who ride it on a motorcycle — particularly east of Oyster Bay — it is something close to a living history book moving beneath two wheels.
What follows is a guide, a cultural essay, and an invitation. Ride the route. Stop where the road demands it. And end where the North Shore has been gathering for over two decades: the Heritage Diner parking lot at 275 Route 25A in Mount Sinai, where there is always room, always coffee, and always a reason to sit down and talk about the miles.
The Road Itself: 300 Years of North Shore History
Route 25A is also known as the George Washington Spy Trail in certain sections — named for Washington’s 1790 horse-drawn carriage tour along this same corridor, during which he traveled to thank the Long Island supporters and members of the Culper Spy Ring who helped secure the American Revolution. That’s not marketing copy. That’s the actual history of the road you’re riding.
The eastern end of the trail winds through Smithtown, Stony Brook Village, and Setauket, and is considered the best historically preserved portion of Route 25A — home to a number of sites that Washington himself passed more than two centuries ago. The Culper Spy Ring operated out of these villages. The taverns, farmhouses, and shoreline coves of this stretch served as a covert intelligence network that fed information directly to Washington’s command. Riding through Setauket with that in mind changes the way the landscape reads.
The entire Route 25A corridor is also known as the Long Island Heritage Trail, encompassing not only the Washington Spy Trail but numerous other historic sites of interest.
Where to Start: Glen Cove and the Western Approach
The route from Glen Cove to Port Jefferson along the North Shore takes riders through neighborhoods of beautiful, affluent homes, then across a drawbridge into Oyster Bay, where the road hugs Long Island Sound. This is the recommended starting point for those coming from Nassau County or the city. The western miles of 25A are more suburban and more interrupted, but they set the stage. By the time you reach Oyster Bay the road begins to breathe.
History-lovers will want to stop at Sagamore Hill in Oyster Bay — Teddy Roosevelt’s home — and take a moment at Oyster Bay Harbor, one of the inspirations for F. Scott Fitzgerald’s most famous novel. Lloyd Harbor, further along the route, carries a similar atmosphere. These are not detours. They are the point. Route 25A rewards the rider who is not in a hurry.
The Huntington Stretch: Where Bikers Have Always Gathered
Past Cold Spring Harbor, the road begins to feel like something earned. The houses set further back. The canopy of trees closes in overhead. Huntington presents itself as a beautiful New England-style town with an independent bookstore and one of the most storied biker gathering spots on the island — a roadside food stand and café racer sanctuary with old wooden picnic tables where sport bikes, cruisers, and muscle cars peacefully coexist.
From spring until autumn, this stretch of 25A becomes a major stomping ground for Long Island riders — many of them professionals out for a little motorcycle therapy and a cold drink. The culture here is not performative. Nobody is posturing. The bikes range from vintage Triumphs to modern BMWs to fully chromed Harleys, and the conversations are the kind you only have when you’ve just ridden somewhere worth talking about.
From Huntington, the road continues east through Kings Park, Smithtown, and into the Stony Brook corridor — the historical heart of the route.
Stony Brook and Setauket: The Most Preserved Miles
This is where Route 25A earns its historical designation fully. The Three Village area — Stony Brook, Setauket, and Old Field — represents some of the most intact colonial-era architecture and landscape on the entire East Coast. The Stony Brook Grist Mill, the Emma S. Clark Memorial Library, the Caroline Church of Brookhaven: these are not reproductions. They are originals.
The Raynham Hall Museum in Oyster Bay and the Huntington Militia Arsenal are among the anchoring historical sites, but it is the Setauket stretch where Washington’s own journey is most tangible. Riders who slow down through here — and the road rewards that — will find themselves passing properties that look much as they did when the first Continental soldiers moved through.
The light here in the late afternoon, particularly in September and October when the foliage begins, is unlike anywhere else on the island. The road narrows. The trees arch overhead. The water appears in brief flashes through the tree lines — Long Island Sound to the north, harbor inlets to the south. This is not suburban riding. This is something older.
The Final Miles: Into Mount Sinai
East of Stony Brook, Route 25A transitions into the quieter North Shore corridor approaching Port Jefferson and Mount Sinai. The road widens slightly, the traffic loosens, and after a hundred miles of history, the pace begins to settle. This is the final stretch — and it’s a good one.
Running for 14.48 miles from its start at the Northern State Parkway interchange in Hauppauge to its end at Route 25A in Mount Sinai, Route 347 (Nesconset Highway) offers riders an alternate approach from the south, with its own picturesque landscapes through Nesconset and Port Jefferson Station. Riders coming from the south or west can pick up 347 and meet 25A directly in Mount Sinai — a natural convergence point.
The Heritage Diner sits right on 25A at 275 Route 25A in Mount Sinai. The parking lot is large. It handles groups easily. There is no pressure, no ticket, no reservation — just pull in, find a spot, and walk through the door.
The Heritage Diner: The Natural End of the Road
A ride like this deserves a real destination, not a gas station or a chain. The Heritage Diner has been feeding the North Shore for over 25 years — a landmark at the 25A corridor in Mount Sinai that has outlasted trends, economic cycles, and the slow erasure of the neighborhood diner as an American institution.
The menu runs deep: sourdough bread baked fresh daily from a slow-fermented starter, egg plates that hold up to the hunger a long ride generates, burgers built the right way, and a coffee program that will sustain the return trip or extend the afternoon conversation well past sundown. The parking lot accommodates bikes of every kind, and groups have always found the space welcoming — there is something fitting about ending a ride down a historic American road at a place that was built on the same principles: hard work, real ingredients, and the belief that the ordinary transaction of feeding someone deserves to be done with care.
Planning the Ride: Practical Notes
Best seasons: Late May through October. Fall foliage on the Setauket and Stony Brook stretch (late September through mid-October) is the single best window for the route.
Starting points: Glen Cove (full route, approximately 60 miles to Mount Sinai), Oyster Bay (mid-route start, approximately 40 miles), or Port Jefferson (short version, 10–15 minutes west on 25A).
Key stops along the way:
- Sagamore Hill National Historic Site, Oyster Bay — nps.gov/sahi
- Raynham Hall Museum, Oyster Bay — raynhamhallmuseum.org
- Centerport waterfront area, Centerport
- Stony Brook Village Center, Stony Brook
- The Setauket-Port Jefferson Greenway Trail corridor
Parking at Heritage Diner: Large dedicated lot directly off 25A. Group rides welcome. No advance notice needed.
Heritage Diner: 275 Route 25A, Mount Sinai, NY | heritagediner.com
Route 25A is one of those roads that rewards the rider who understands what they’re riding through. Three centuries of American life have played out along this corridor — espionage, revolution, literary imagination, architectural preservation, and the quiet daily rhythms of the North Shore communities that have held their character against every pressure to lose it. Ride it slowly. Stop often. Let it end with a meal worth remembering.
