Raritan River Greenway in Somerset County: A Local Walking Guide

Ask three people in Bridgewater or Somerville where the Raritan River Greenway goes and you'll get three different answers, and none of them will be wrong. That's because the greenway everyone talks about isn't a single continuous trail with a start and an end. It's a set of separate pieces, built at different times by different towns, that only sometimes touch each other. Some of those pieces got real money and new connections this year. One of them just stops in the middle of a mowed field.

If you walk a dog along the Raritan most weekends, or you've been meaning to bike the towpath before the leaves turn, that gap between the map in your head and the trail under your feet is worth understanding. Here's what's actually out there this fall, where it quietly ends, how the county is adding riverfront land, and where the borough is improving downtown connections.

The Stretch You've Probably Already Walked

The one piece of the greenway that reads as a genuine trail, start to finish, runs about three miles from a low hill near Red Oak Way in Bridgewater to Nevius Street in Raritan. That hill sits at roughly seventy feet in elevation and gives a clean view south over the river. From there, a paved bike path picks up less than a quarter mile east and carries you toward an old railroad bridge near Woodmere Street, while a parallel dirt footpath tracks the old Raritan Power Canal the whole way. A newer pedestrian bridge on Old York Road, with its own parking area, gives you another way onto that stretch without doubling back.

Most of this section runs through Duke Island Park, the 343-acre county park the Somerset County Park Commission has managed since 1958. The park's own 2.2-mile paved loop is where the dog-walking crowd tends to stay, partly because it's flat and partly because it puts you right alongside Headgates Dam, where the river drops over a small spillway into a pool that dogs off the trail seem to like as much as the people do. Dogs have to stay on leash here. There's no fenced off-leash area, but there are poop bag stations, shaded benches, and enough width on the paved sections that runners and strollers aren't fighting for space.

Keep walking east past the park boundary and you'll cross Nevius Street on a bridge worth stopping on. It's an 1886 metal-truss span, reportedly the oldest bridge of its kind still on record in the country, and in October the sightline from its benches down the Raritan is one of the better free views in the county.

Where the Trail Actually Runs Out

Here's the part the trail apps don't advertise. Once you're past Raritan's center, the mapped route crosses a mowed field with no built path at all, then ducks through a tunnel under the Lyman Street Bridge before picking back up. It isn't dangerous or unmarked in a confusing way. It just isn't a trail in the sense that the Bridgewater-to-Raritan stretch is a trail. If you're expecting continuous pavement or packed stone dust the whole way to Somerville, that field is where the expectation breaks.

This is also where any future extension has to solve a real problem. County planning documents have floated a further section connecting Nevius Street to Route 206, tied to the long-discussed redevelopment of the old Somerville landfill site and the conversion of the former Raritan Woolen Mills into apartments. Getting there would take a small bridge over the canal and another over Route 206 itself. None of that is funded or scheduled yet. It's the missing middle piece, and everyone who plans the greenway knows it.

The Piece the County Is Quietly Buying

While the missing middle waits, Somerset County has kept doing what it's done for a decade: buying small parcels of riverfront land in Bridgewater whenever they come up. In October 2025, the county closed on an additional 0.23 acres of vacant, wooded land along the Raritan in Bridgewater Township for $7,500, with total costs including fees landing around $10,000. It's a small purchase on its own. What makes it worth noting is where it sits and what it's part of. That parcel brought the greenway's total footprint, including Duke Island Park's own acreage, to 842 acres as of the county's October 2025 announcement, and the county said roughly 20 more acres in that same stretch of Bridgewater were under active consideration for acquisition at the time.

As of that same announcement, the county's Open Space Preservation program had added more than 22 acres to the greenway over the prior decade, a few tenths of an acre at a time. It's not a headline-grabbing pace, but it's a consistent one, and it's concentrated in exactly the corridor that would eventually need to connect to that missing Nevius-to-206 link. These purchases add riverfront land, while the Nevius-to-206 connection remains unfunded and unscheduled.

Downtown Is Getting the Same Treatment

The money is moving faster on the Somerville side of things, where the greenway's urban cousin, the Peters Brook Greenway, follows the brook north into the borough and gives walkers a car-free route toward downtown.

In April 2026, Congressman Tom Kean Jr. submitted a slate of 20 Community Project Funding requests to the House Appropriations Committee. Eighteen were selected, including $1.94 million for two connected improvements in Downtown Somerville: the Division Street Arts Plaza and the Giardina Walk Improvements. The Division Street project rebuilds the full corridor between South Street and West Main Street with brick pavers, granite curbing, ADA-compliant curbing, and a new pedestrian crosswalk at the West Main Street intersection. Giardina Walk does similar work on the pedestrian connector between Union Street and West Main, which is the direct route from Municipal Parking Lot #4 into the retail core.

That federal money follows work the Downtown Somerville Alliance had already started. In June 2026, the Alliance installed seven modular cube seating configurations, four decorative planters, and two new bicycle racks on Division Street and Giardina Alley, paid for through a Main Street America grant. As reported by TAPinto, Downtown Somerville Alliance director Dana Kessel said:

"Division Street has become the heart of downtown activity, and these enhancements make it even more inviting for residents and visitors alike."

Put those two funding streams together and the pattern is the same one playing out along the river. Somerville isn't building new mileage so much as it's reinforcing the connective tissue, the sidewalks and plazas that turn a walk from the parking lot into a reason to stay.

Finishing the Walk on Main Street

That connective work matters because it changes what a fall walk here actually looks like. A few years ago, combining a walk through Duke Island Park with a visit to downtown Somerville meant getting back in the car. Now the Peters Brook connector and Division Street improvements make it realistic to include Main Street in the same outing, although the mapped route past Raritan includes a gap without a built path.

Once you're there, downtown Somerville has kept adding places worth the extra ten minutes. Verve Restaurant & Landmark Bar, at 18 East Main Street, has built a following on French bistro cooking and a bar program that regularly gets called out by regional food writers. De Martino Latin has been a Main Street brunch fixture since it opened in April 2019, known for dishes like tres leches French toast, and the concept has done well enough that a spinoff, Brunch by De Martino, is opening in Denville. In 2025, Efes Mediterranean Grill signed a ten-year lease on 6,300 square feet at 69-71 West Main Street, becoming the Turkish and Mediterranean grill's fourth New Jersey location after Jersey City, Princeton, and New Brunswick.

If you're planning the walk yourself this fall, a few practical notes make the difference between a pleasant afternoon and a confusing one:

• Park at the Old York Road lot or the Bridge Street lot in Raritan if you want to walk the completed Bridgewater-to-Nevius Street stretch without backtracking on foot.
• Bring a leash and bags even for a short loop. Duke Island Park is on-leash only, no exceptions, and there's no fenced area to let a dog run.
• Don't count on the trail continuing past Raritan's center. If you're aiming for Somerville, plan to pick up the route again on the Division Street side rather than expecting a marked path through that mowed field.
• Go in the next several weeks. Reviewers consistently point to the towpath's fall color, with the canal on one side and the river on the other, as the best version of this walk all year.

None of this requires you to be thinking about buying or selling a house. It's just a more accurate map of a place a lot of people already walk every week, and knowing where the pieces actually connect, and where they don't yet, makes the walk better.

If you're the kind of person who likes understanding a place this closely before making a bigger decision about it, that's the same instinct that serves you well when the time comes to buy or sell here. Beverly Yoson has spent her career in these towns for exactly that reason. Let's Connect.

This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.