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Routes
Hiking trails & Routes
United States
Massachusetts
Middlesex County
Maynard

Assabet River Rail Trail

Easy

4.8

(3267)

13,587

hikers

Assabet River Rail Trail

01:38

6.32km

30m

Hiking

Hike the easy 3.9-mile Assabet River Rail Trail, gaining 110 feet in 1 hour 37 minutes, with river views and wildlife opportunities.

Last updated: February 26, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Waypoints

A

Start point

Parking

Get Directions

1

760 m

Assabet River Dam

Highlight • Structure

The Assabet is a "working river" and observed from above, it seems to be stapled to the landscape by bridges.

Over its 31-mile route, more than 40 bridges span it.

Tip by

1.36 km

Thanksgiving Pond

Lake

3

4.57 km

4

6.02 km

Mill Pond Footbridge and View

Highlight • Bridge

There is a footbridge that crosses over Mill Pond and offers views from both sides of the bridge. The reservoir is sometimes referred to as Fort Pond Brook Reservoir because …

Tip by

B

6.32 km

End point

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Way Types & Surfaces

Way Types

6.00 km

319 m

Surfaces

6.05 km

107 m

104 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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Weather

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Today

Thursday 9 July

33°C

18°C

31 %

Additional weather tips

Max wind speed: 16.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

Where can I park to access the Assabet River Rail Trail?

Parking is available at various access points along the trail in towns like Marlborough, Hudson, Maynard, and Acton. Specific parking lots are usually well-marked at trailheads in these communities.

Is the Assabet River Rail Trail dog-friendly?

Yes, the trail is generally dog-friendly. However, please ensure your dog is kept on a leash and that you clean up after them to maintain a pleasant experience for all users.

What is the best time of year to visit the trail?

The trail offers different experiences throughout the year. Spring and fall provide pleasant temperatures and beautiful foliage, while summer offers a shady canopy in wooded sections. Some unpaved parts, particularly in Stow, may have drainage issues after heavy rains, so consider avoiding those sections during or immediately after wet weather.

Are there any permits or entrance fees required for the trail?

No, there are no permits or entrance fees required to access the Assabet River Rail Trail. It is free and open to the public.

What is the terrain like on the trail?

The terrain varies along its length. Many sections are paved and flat, especially in Hudson, Maynard, and Acton, making them suitable for all users. Other parts, like the Stow section and within the Assabet River National Wildlife Refuge, feature hard-packed dirt and gravel. The Marlborough section is paved but includes some hilly portions, offering a moderate challenge.

What kind of scenery and points of interest can I expect along the route?

The trail offers diverse scenery, from deep woods and river views to urban and residential transitions. You can enjoy frequent waterfront views of the Assabet River, especially in its midsection. Notable points of interest include the Assabet River Dam, Pond View on Assabet River Rail Trail, and the Mill Pond Footbridge and View. You'll also pass through downtown Maynard with its renovated 19th-century mill buildings.

What wildlife might I see on the trail?

As the trail travels alongside the Assabet River National Wildlife Refuge, you have good opportunities to observe wildlife and migratory birds. The refuge's wetlands, vernal pools, and forested habitats are home to various species.

Is the trail accessible for wheelchairs or strollers?

Yes, many of the paved and flat sections, particularly in Hudson, Maynard, and Acton, are suitable for wheelchairs and strollers, offering an easy and accessible experience.

Does the trail connect to other paths or natural areas?

Yes, a significant portion of the trail borders or passes through the 2,230-acre Assabet River National Wildlife Refuge, providing access to additional hiking trails within the refuge. It also connects the communities of Marlborough, Hudson, Stow, Maynard, and Acton.

Are there amenities like water or food options along the trail?

While there isn't always water directly on the trail, passing through downtown Maynard offers opportunities to find food options and other amenities. It's always a good idea to carry your own water, especially for longer excursions.

Does the trail have any historical significance?

Absolutely. The trail follows the abandoned rail bed of the Marlborough Branch of the Fitchburg Railroad, which operated from 1850 to 1980. You can still spot reminders of its industrial past, and Henry David Thoreau even walked along these same railroad tracks in 1851.

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