Assabet River Rail Trail


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Assabet River Rail Trail Facts

States: Massachusetts
Counties: Middlesex
Length: 10.4 miles
Trail end points: 19 Maple St (Acton) to Sudbury Rd. (Stow) and Wilkins St (Hudson) to Highland St and Lincoln St (Marlborough)
Trail surfaces: Asphalt
Trail category: Rail-Trail
ID: 6015946

Assabet River Rail Trail Description


The Assabet River Rail Trail connects five old mill towns that owe their revitalization to present-day high-tech industries. A midpoint gap splits the 10.4-mile trail. It offers a forested escape for recreation and a route for Boston-bound bike commuters to reach the train station in South Acton.

About the Route

The northernmost section of trail starts opposite the tracks of the Massachusetts Bay Transportation Authority’s (MBTA) South Acton Station; passengers can take bicycles on the Fitchburg line on Saturdays, Sundays, and off-peak hours during the week. Dedicated trail parking is available on Maple Street.

Leaving off from Acton, the trail passes the only farm along the trail on the right, and then crosses Fort Pond Brook, which housed mills here beginning in the early 1700s. The trail enters wetlands before arriving in Maynard and traveling through its busy downtown. Here, the trail crosses the Assabet River on a bridge, which offers good views of renovated 19th-century mill buildings.

The paved rail-trail ends at White Pond Road at mile 3.2. For the next 1.9 miles the railroad corridor passes through the 2,230-acre Assabet River National Wildlife Refuge along a track road, a public access dirt road that’s more suitable for mountain bikes. The next 2 miles of corridor, between Sudbury Road and the trailhead on MA 62/Wilkins Street in Hudson, is closed, as it crosses private land.

The northern trail of the older section of rail-trail is located at the MA 62 trailhead. The trail once again offers views of the Assabet River as it crosses a small bridge alongside MA 62/Main Street, where trail users may also see a restored 1921 Boston and Maine Railroad blue caboose before it enters Hudson’s commercial district. Hudson was once known as Shoe Town for all the shoe-making factories along the river. The best view of the river comes about 0.6 mile past the caboose as the trail crosses a trestle 40 feet above the river.

Leaving Hudson, the trail again plunges into woods that offer a shady canopy as you begin a gentle climb to Marlborough. Passing beneath MA 85, the trail enters Marlborough and cross wetlands around Flagg Brook that serves as a wildlife corridor. Here, trail users can spot the Fort Meadow Reservoir from an overlook with benches. The path continues about another mile, reaching the trail high point at Hudson Street, before reaching its southern endpoint along Lincoln Street.

Trail History

Trail plans date to 1992, when local residents eyed the former railbed of the Marlborough Branch Railroad as a rail-trail project. The branch ran from a junction with the main line Fitchburg Railroad in Acton southward along the Assabet River beginning in 1849, extending to Marlborough by 1855. The Fitchburg Railroad subsequently merged with Boston and Maine Railroad. Passenger service ended in 1958; freight ended in the 1960s. All five towns along the route voted in support of the rail-trail in 1998, and the first section opened in 2005.

Parking and Trail Access

The Assabet River Rail Trail runs between 19 Maple St (Acton) and Sudbury Rd. (Stow) and Wilkins St (Hudson) to Highland St and Lincoln St (Marlborough), with parking in Acton and Hudson.

Parking is also available at:

  • 157 Washington St (Hudson)
  • 56 Jefferson St (Marlborough)

See TrailLink Map for more options and detailed directions.

Assabet River Rail Trail Reviews

Absolutely beautiful!!

Fantastic trail. I started at in Marlboro (at Lincoln St). Serene and peaceful. Great combination of shaded and sunny areas. The surface is flat and mostly downhill for the majority of the route. However…on the way back was when it turned into a workout. Gentle and moderate inclines. If you aren’t used to this, there are plenty of benches to take a rest along the way.

Cool quick ride

If you want a quick ride, this is your trail. Enjoy!

A Favorite For Inline Skating

Mostly smooth and even and only a couple slopes that could send you flying. Definitely one of our favorites for inline skating.

Assabet River Rail Trail / August 2020

If you want to have a good bike workout I recommend to try to bike the two sections of the trail. Start at the Acton trailhead and when you reach the end of the Acton-Maynard trail after you biked 1.9 miles on a dirt road (near the Assabet River National Wildlife Refuge) veer right on Sudbury Road. After you pass a sign for Honey Pot Hill Farm (you will be in Stow at this point) veer left and continue on Sudbury Road until the intersection with 62 west. Ride until you see the sign of the Riverside Gun Club. Right after you will reach the Hudson trailhead parking on your right and you will be on the Hudson-Marlborough section. You will be on the road for two miles until you reach this section. The 2 miles on the road and the 1.9 miles on dirt road add extra mileage to a complete trip of this trail around 12.5 miles (one way). Beautiful ride on the Acton- Maynard section.


Assabet River trail

—We really enjoyed this urban ride through Hudson and Marlborough. Start at the Hudson trailhead so the return trip is downhill. Scenic Lake overview in the middle is perfect for a picnic lunch. We hit Greater Effect brew pub on the way back. Plenty of outdoor seating for these tricky times. About 10 miles round trip.

disappointing. where is river?

Easy to bike on. Mostly flat or gentle slopes throughout. Many roads to cross along the way, crowded with people, not much to view.

Hudson, Marlborough great for all riders

I've ridden this trail several times. Most recently today with my wife. Good workout if you start at Rte. 85 by McDonald's and push hard to Lincoln Street in Marlborough then head back and ride to the terminus in Hudson by Riverside Gun Club. Good 10.2 mile run that can be done in an hour after work.

E Hudson lot next to Gun Club to Marlboro line

Too many street crossings and too many hills. The ride back was a better. Next time, we'll park at Advanced Auto Parts, 157 Washington St to avoid all the street crossings in Hudson

Love it.. great for kids

My daughters bike connects to my bike (trail-a-bike) which allows her to pedal and get exercise as well. We found that this trail with a slight incline as you get in to Marlborough was perfect amount for a 6yr to conquer. With great art along the way, beautiful views and the perfect amount of shade and sunshine - we absolutely love it and highly recommend it. The only thing I wish it had is mile markers because round trip I still don't know how much we biked.

Full Ride from Northboro to Acton (train station)

Excellent mid-morning Summer ride - Tuesday, so not a lot of traffic on the trail. A two mile road section is required to connect the two sections of the trail. This is not a problem as long as you are careful on the road. The trail is fully paved except for the two mile section on Track Road adjacent to the Assabet River National Wildlife Refuge. I would not recommend a road bike on this section. It is dirt and gravel with a few bumps, but not a problem for trail bikes. The scenery in this area is impressive as it is on the Acton end as well. Total distance approximately 12.5 mi. Recommended.

Directions are wrong for Maynard trail head!

We did the trail from Hudson to Marlborough and were going to drive to the trail head in Maynard to check out the other section of this trail. However we found out the directions are incorrect. You need to go EAST on 117 not west. I hope this will be corrected. We did enjoy the trail from Hudson to Marlborough but that is mostly up hill and not gradual in some areas. I suggest going from Hudson so you get the down hill on the way back.

Hudson side in Winter

I discovered this winter that the Hudson side of the trail (unlike the Marlborough side) has no snow and ice removal. We went there to walk several times this winter and it was impassable.

Not very ideal for inline skating

I am an inline speed skater, and just moved to this area. I did practice several times on my speed skates on this trail. The elevation change is about 260 ft from Hudson McDonald's to downtown Marlboro, and there are 4 highway intersections -- these are not very safe for inline speed skating, because there is no brakes on speed skates, and it is sometimes scary when you are skating downhill at over 20 mph and you know there is a highway intersection ahead.

However it is still a good trail for beginners and recreation skaters.

Wonderful ride.

Smooth paved and fairly easy ride in either direction. Friendly people that often smile and say "hi".

Excellent New Northern Portion

We very much enjoyed riding the almost completed northern potion of the the ARRT. Except for a short,maybe, 400 foot section near Summer Street and Rt. 27, the whole length is usable when construction is not occurring.
You can add on an additional almost 2 miles from the southern end of this new section and ride on gravel to Sudbury Road near Honey Pot Hill Orchards.

Extension underway

As a Hudson resident this is my home course from Hudson to Marlboro and back. I extend it by riding through downtown Marlborough and picking up route 85, bike friendly width, to Southboro. They are extending the trail to Acton now, with sections paved. From Hudson trailhead, follow 62 north to Sudbury road, past Honey Pot Orchards. Cross Assabet river and gated dirt rd on left, turns to crushed stone after a mile, and paved at White pond rd crossing to Maynard. Ends on 27 towards Acton, and picks up again down 27 on your left. too many unfinished sections to get any speed going, but will be great when finished.

Nice ride.

This is not a super long trail but since it is pretty much all up hill going from Hudson to Marlboro, it still gives you a work out. That being said you should start in Hudson so the way back is down hill.
We did not go on the trail that starts in Maynard because it was closed.

well maintained and dog friendly!

I parked on Sasseville Way in Marlboro and headed toward Hudson with my pooch. We walked only for about a mile and a half, but met nice people, and other dogs as well. It was well marked, clean, and even had a few trash cans along the way!

Better than expected!

There are road crossings, especially on the Hudson side of the trail, but they are very manageable. The path description doesn't do this path justice. It's a nice ride with frequent benches to take a break. There are hills especially going from Hudson to Marlboro. Enjoy!

Mostly a suburban ride

Nicely maintained trail with good parking at the Hudson trailhead. Not sure why it is called a river trail as any river is difficult to spot. Nice overlook of the reservoir halfway.

A beautiful way to enjoy an early Autumn afternoon

I can't believe I've lived in the 'boros for 16 years now and just got around to riding this trail. Given the weekend car traffic around here, it's a great way to enjoy the seasons and your bike without having to worry about getting splattered across the highway. It's gorgeous ride as it meanders through the woods and across the river. As Hudson has become kind of a hipster hangout these days, that end of the trail was a little congested with young families and fitness walkers. But hey, how could you deny anyone a walk in the woods on a beautiful Autumn afternoon? My point is, just don't plan on using the trail for a bicycle time trial in the middle of a nice day; somebody might get hurt and you'll look like an idiot in any event. If you're not in a hurry, the Rail Trail flatbread company in Hudson is a worthwhile stop for a snack and a beer.

A really nice ride.

A bit urban, like riding through people's backyards, but smooth and easy going. No bugs this time of year.

Wide and well paved

While there were several streets to cross on this trail (about 7 minor intersections that could be crossed easily and 5 intersections that required the use of a traffic signal to cross), the trail is nice and wide and very well paved. There are some very pretty stretches through the woods. If you start in Hudson, you'll ride uphill most of the way, so the return trip is a breeze!

very nice

Very nice and relaxing. Got their last week using car service while I was on a tour in that area and some fresh air was needed. The trees leaves start changing took lots of pics and met really nice people with big smiles on their faces.

Very well maintained trail

This is a small trail that i love to bike on. VEry well maintained and good parking spots.

Assabet bike trail

Lots of street crossing. Ice cream is available on route.

Fantastic for running

This place is a really great place for a run. If you park at Jefferson street in marlborough, you can run through the most beautiful parts of the trail. It's well maintained and very safe feeling.

just on this trail

I was just there recently..and do not recall seeing any facilities on this trail... though it starts at Hudson and ends at Marlboro so one could probably find facilities somewhere I suppose... anyway. the trail is not very long and pretty nice though there are a fair amount of major road crossings with crosswalk lights... so this was sort of a drawback for me... still a nice trail though... on the weekend there were also a lot of people walking and also walking dogs etc I would probably drive a little further and go to the Nashua trail in Ayer which is longer and less crossings etc.. but quite a bit longer trail at 25 miles round trip. Hudson is only around 10 miles round trip... hope this review helps some...thanks


Does anyone know if there are any handicap accessible restroom facilities at or near this trail?

nice trail..not too long

I recently tried out this bike trail...It was pretty nice...though I did not much like the Hudson downtown crossing, a bit confusing at first to me..once you get past that part the trail is quite nice..and ends up in Marlboro. it is not that long a path but still a nice ride.. its pretty much all wooded with a few open spots here and there... also a few scenic spots.. l liked it quite a bit.... worth a try

Great trail, Nice views

Next time I am renting or bringing a bike! We walked and/or ran this trail and it was beautiful. I got the great pictures and we started every day we were there with it.

Well maintained beginner to moderate level train

I googled the park listed and parked directly across from it in the municipal lot. You can link to the trail by going out the lot to the left or the right. The trail itself is clear and well maintained. I saw lots of families, walkers, bikers, and runners but the trail was never crowded. The stops at intersections were a little annoying but no real problem and you never have to worry about riding on the road with heavy traffic. All the busy intersections are well marked and have crossing signals. The trail is mostly paved with a tiny section of about 4 yards being a solid wood bridge. The only reason I say this could be a moderate trail is the distance and small hills, as if you start at the lot listed and complete the trail out and back you will go about 10 miles. And on the way out you will have good trail, mostly slight downhill, trail. Which means the way back will be at a slight incline. Not bad at all, there were children under 10 doing it!, but I mention it for a full description.

excellent ride

i drove from lynn to try this trail and am glad i did very scenic and well maintained the viw from the overlook was out standing and well worth it the people of hudson have done aterrific job of maintaining the trail and should be very proud the only negative thing is there is quite a uphill ride from sharon to marlboro but coming back was great

Nicely maintained, lovely birthday ride

I started around Vila del Porto and rode 2.5 mi towards Marlborough, then turned around went all the way to the trailhead in Hudson, then back to my car for a total of 7.5 mi. So early in spring there were very few people, and there was quite a bit of leaf clutter on the trail. It's nicely paved and goes through lovely treed sections. Be aware that crossing Rt 85 has a crosswalk, but people do speed along that road. Otherwise, crossings typically have pedestrian lights and are well-marked.

Be also aware that from Hudson to Marlborough there is a relatively steady grade up. It's mostly a low grade, but your legs will get tired going uphill for so long. It's why I started in Hudson: so the ride back would be mostly downhill!

Not all paved

From my home in NE Bolton, I rode the Hudson/Marlboro section both ways and found the 20 mile ride delightful. I will post a picture or 2. Today, noting that the map shows it also in solid red, I set out for the Stow/Maynard part and was very disappointed to find it unpaved at the Sudbury Road entrance. It didn't look very road-bike friendly, so I returned home. A useful improvement to the map would be to have the surface indicated by color, dashed/dotted lines, etc.

Maynard to Stow section, part of a half century ride

A delightful half century:

...which incorporated the two larger currently open sections of the Assabet River Rail Trail (and the Reformatory Branch Rail Trail and the Minuteman Rail Trail).

The section of the ARRT between Maynard and Stow is 2.4 miles. It's part of the Assabet River National Wildlife Refuge, and it offers a few glimpses of the river through the thick foliage and some small open areas that lead to the bank of the river. The trailhead is on Winter St. in Maynard, but it is not clearly marked. In fact, it looks like you're going onto someone's dirt driveway for a while. As you get further into the Refuge, the old railbed has been widened and turned into a dirt road. You'll see some cars driving along in this section. After this wider section the railbed narrows again to a one-lane dirt road, and it's in reasonable shape for a hybrid or mountain bike, but there are a few muddy spots, and the path can be a little overgrown. It is very passable, though, to Sudbury Rd. in Stow, where there is a locked gate to keep cars out (although cars can get in from the other side).

The railbed continues across Sudbury Rd., but it's well overgrown and didn't seem passable at this time (May 27, 2012), and I think the rails and ties are still in place at some point. From Sudbury Rd. I went on-road to pick up the paved section of the ARRT in Hudson (which people have written about in other posts).

Beautiful trail, but more of a grade than most rail trails

The 5.6 mile length of this trail makes it perfect for a short afternoon ride. Excellent surface of fairly new pavement on the entire trail. Fairly scenic with a few very nice vistas, and rest areas with benches at several points. Just be aware the the trail is downhill all the way from Marlborough to Hudson. I started in Marlborough, and the grade didn't seem that steep as I was heading out. On the the return trip, I realized that even a moderate grade can be pretty demanding when you're climbing it for 5 miles without any level breaks. Maybe next time I'll start in Hudson, and get my work out on the way out, then enjoy the downhill coast on the return trip.

Assabet River Rail Trail website

The friends-of-the-trails for the Assabet River Rail Trail is

Question about Website directions

You need to make sure you type your address in the space provided before getting the directions to the trail

Nice Trail

Rode the trail on my bike yesterday and it was a nice ride. Parked in Hudsn in the Wilkins St lot and rode it to the end in Marlboro. It was approx 10.5 miles round trip. The trail is well marked and somewhat easy to follow except for 1 intersection when you stop and have to try to figure out which way to go. One section was under repair and had to ride in the street but not for long and you were back on the trail. It's a well kept and clean trail. Would ride it again.


"I've been trying to get to the Assabet River Rail Trail website for several days now and get a error message that the DNS server cannot be found. What's happening??


"Where is the website for this trail? When I click on the link I get advertisemet? I want to see the website...

Nice riding

Rode from Hudson to Marlboro & return. One bridge just about finished and another across the river on Rt.62 they just started the work on. Nice tunnel under Rt.209 and some very nice views. All nicley paved. Will be great when it is finished to Acton.

Nice Trail

We live in Marlboro and riding from our house to the trail makes it a nice ride for after work. My only complaint is that people walking need to make sure they don't walk 5 or 6 across blocking both sides of the trail. Stay to the right...

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