Start at the River Street lot, a little past 300 River St. Walk east and you reach two footbridges over the Quinapoxet, then a field of granite pillars standing among stone foundations. That is all that's left of the Springdale woolen mill. It was started in 1867 and rebuilt in stone after an 1875 fire. Then the water board took it in 1905 and tore it down to protect Boston's water supply.
That same year, 1905, a dam went in a little downstream at the reservoir's Thomas Basin. It stood for 120 years. In 2025 it came out.
Most of Holden's rail trail runs on Massachusetts DCR water-supply land. Boston's water explains why the trail exists, why the mill is a ruin, why your dog usually has to stay home, and why this fall is worth a walk. Two projects finished in 2025 changed the trail more than anything since Wachusett Greenways opened its first mile in 1997.
What Came Out of the River
The Massachusetts Water Resources Authority ran the Quinapoxet River Dam removal. Luciano's Excavation, Inc. was the contractor, and DCR and the Department of Fish and Game, including its Division of Ecological Restoration, helped with planning and funding. MWRA held a ceremonial groundbreaking on June 17, 2024.
The state celebrated the finished project on September 10, 2025. Here's what the Healey-Driscoll administration's release says it delivered:
| Item | Figure |
|---|---|
| Project cost | $3 million |
| Dam removed | 250 feet long, 18 feet high, earthen embankment and stone masonry |
| River reopened to fish | 35 additional miles |
| Upstream habitat restored | About 1,000 feet |
| Riparian habitat restored | One acre |
| New public access | ADA-compliant riverbank path, platform and interpretive signs |
According to the release, the dam had cut off brook trout and landlocked salmon in the Wachusett Reservoir, leaving those populations genetically isolated. The dam was no longer needed once MWRA upgraded how it moves water through the system.
At the ceremony, Department of Fish and Game Commissioner Tom O'Shea made the point that matters most for a walk in October:
"We eagerly await the fall migration of land-locked salmon from the Wachusett Reservoir!"
He said that in the state's September 2025 release. This is the river's second fall running freely. MWRA planned two years of monitoring after construction, so the record of what has come upstream is still being built. No official count of returning salmon has been published yet.
The dam site, the new platform and the trail's eastern start are just over the line in West Boylston, at the Thomas Basin. Holden's river miles are the stretch those fish would swim up to reach.
The Hill That Got Twice as Long
The second 2025 change is at the other end of town. West of Manning Street, the trail leaves the river and climbs. In June 2025 Wachusett Greenways finished a 2.3-mile accessible route of switchbacks over the hill between Manning Street and Route 31. Wachusett Greenways' 2023 annual report described the project as expanding that section from 1.1 miles to 2.3.
The trail guide lists the new route as accessible. Near the top there's a view north from beside a farm. That farm is private land, so stay on the trail.
In September 2025, Wachusett Greenways held a dedication at Manning Street for its three most recent Mass Central Rail Trail projects. Together they cover six miles between River Street and Princeton Street, according to the Mass Central Rail Trail Alliance's 2025 recap. The group is all-volunteer. It and its partners have finished 21 of a planned 30 miles between Sterling and Barre, part of the 104-mile Northampton-to-Boston corridor.
Manning Street is where the trail changes character. East of it is the river trail. West of it is the hill trail. Choosing a parking lot means choosing which of the two you want.
Pick the Lot by the Outing
The full route runs about nine miles. It's mostly stone dust, with a paved road stretch on Mill Street, and it goes from the Thomas Street lot in West Boylston's Oakdale village to a gate on Princeton Street. Five of the six lots are in Holden.
| Holden lot | Where | Best for | What's there |
|---|---|---|---|
| River Street | Just past 300 River St | Kaplan bridges and Springdale Mill on a short outing | Year-round accessible portable restroom, bench, kiosk; picnic tables by the river at the bridges |
| Manning Street | Near 200 Manning St, at the flashing crosswalk | The 2025 switchbacks west, or Trout Brook to the east | Large lot |
| Route 31 at Mill Street | Where the trail crosses Wachusett Street | Turnaround for an out-and-back along the Quinapoxet | Larger lot |
| Mill Street | Near 103 Mill St | The quiet western miles toward Princeton Street | Year-round accessible portable restroom |
| Princeton Street gate | Opposite 407 Princeton St | Finishing an end-to-end ride | Room for two or three cars |
From the Mill Street lot, a final set of switchbacks climbs to the Princeton Street gate. That makes the western end the steepest part of a full ride.
A River Walk From River Street, in Order
This out-and-back covers the history and the river in one go:
- Kaplan bridges. Two Wachusett Greenways bridges, named for Charlotte and Jeremiah Kaplan, cross back and forth over the Quinapoxet. There are benches and native azaleas. Pink lady's slippers bloom here in May.
- Springdale Mill Historic Interpretive Site. You'll find foundations of the mill, dye house and picker house, the flume, a dam 115 feet across the river, and the mill village's tenements. Granite pillars hold interpretive signs, and a portable restroom is open May through November. Leave your bike and walk the ruins on foot. Don't ride over them.
- The I-190 bridge. At the Holden–West Boylston line, the interstate passes more than 120 feet overhead.
- Turn back west past River Street to the Quinapoxet River overlook, where the trail runs high above the water. Just before Manning Street, a vent marks the Quabbin Aqueduct running under the trail toward Boston's water supply.
The aqueduct vent and the Springdale foundations both belong to Boston's water system, which took the mill in 1905 and still runs under the trail.
Why the Dog Stays in the Car, Mostly
Because the trail crosses watershed land, the rules are stricter than on a typical town trail. The trail guide says leashed dogs are allowed only on the first stretch, from the Thomas Street lot to I-190, which ends before Springdale Mill. DCR's Wachusett and Sudbury Reservoir fishing guide lists "animals/pets" among the uses strictly banned on Division of Water Supply Protection property in the Wachusett watershed. In short, from any Holden lot, plan on leaving the dog home, and follow the posted signs wherever you start.
For a walk with your dog, the Trout Brook Recreation Area is three-tenths of a mile east of the Manning Street crossing. It's 660 acres of Holden conservation land with walking and mountain-bike trails, a pond and a picnic pavilion, and leashed dogs are welcome there.
Timing matters more as the days shorten. The trail guide says the watershed land is open from one hour before sunrise to one hour after sunset, which leaves less room for a weekday walk after work. These access rules come from DCR and posted signs, not from us. Check the official page or the signs if you're unsure what applies to you.
Before You Go This Month
As of October 8, 2026, the trail guide listed the route as open with a caution notice. The caution is for a 2026 restoration of the Thomas Street lot that Wachusett Greenways and DCR plan to do, with no dates or closure notice posted yet. If your outing starts at the West Boylston end, check Wachusett Greenways first. Starting from River Street or Manning Street keeps you clear of that lot and still gets you to the bridges, the mill and the I-190 bridge.
Thinking about a home near one of these trailheads? Ask Beech Homes Group which streets put the River Street or Manning Street lots within walking distance. Start with a Free Home Valuation and we'll set out the next steps clearly.
