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Assabet River Rail Trail

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Kelleher Park

Assabet River Rail Trail is a 10.5 mile heavily trafficked out and back trail located near Marlborough, Massachusetts that features a lake and is good for all skill levels. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail but must be kept on leash.

Distance: 10.5 miles Elevation Gain: 419 feet Route Type: Out & Back

dogs on leash

wheelchair friendly

kid friendly

stroller friendly


nature trips

road biking


bird watching





rails trails



wild flowers


bike touring
1 month ago

5.25 miles one way and paved the entire way through with plenty of room going in both directions. Pretty leveled most of the time with perhaps a coupe minor inclines closer to the Marlborough side. Brought my three year old on a bike trailer with ease. Began on the Hudson side and it just so happens that if you’re interested in popping in at restaurants or other stores along the trail, they are on the Hudson side. There may be options on the Marlborough side, but they appear not to be immediately off the trail. We went in spring during the COVID-19 scare and everyone seemed to follow the guidelines for the most part. The crowds were spermatic and not a problem. Activities ranged from walking, running, biking and roller skating/blading for the most part. There is a lake closer to the Marlborough side and I’m going to look into seeing if it’s accessible and if fishing is an opting for my little boy. I’ve only been to several trails thus far and I have to say that this one seemed to have plenty of positive distractions if you go at it solo, with children or other adult companion and is one of my favorites.

road biking
1 month ago

Really enjoyable ride. Good for beginners with frequent stops if needed. Pretty clean. Nice view.

2 months ago

Clean trail, pretty views

3 months ago

Super crowded last weekend with lousy compliance of the social distancing guideline, otherwise, not much to see - good for bikes and strollers

8 months ago

Great paved trail, we parked in Hudson off main st next to McDonald’s and walked toward Marlborough. Easy walk!

bike touring
9 months ago

Nice paved rail trail for sure but a bit too many road crossings for me. Next time I'll head in the other direction (toward Maynard) and check out the Assabet Wildlife area. Downtown Marlboro seemed interesting, will go back there at some point. Give it a try.

10 months ago

This is a nice, paved bike and walking path. I’m in town for a conference and was looking for a place to walk that was safe and easy to navigate. This trail checked both boxes. I didn’t see parking at the entrance on Highland St. in Marlborough. But on the walk back I noticed a gravel parking lot near the entrance that’s on Jefferson? It’s across from a baseball field but I’d guess you can park there to access the trail as well.

11 months ago

I take my dog walking on the rail trail every day! It’s clean and you can walk as long or as little as you like. Every time I walk people smile and say hello as they walk by. But it’s never over-crowded.

Sun Jun 02 2019

Perfect trail for the not so good inline skaters. Although I would recommend finishing at Marlborough instead of starting there. As it is mostly downhill from there. PS: All trails, please add any type of skating to your system.

Thu Oct 04 2018

Decent rail trail. A bit short for biking. Better suited for walking/running. No bathrooms at either trail head. There is a johnny on the spot in a parking lot in downtown Hudson. Otherwise you need to invade one of the businesses along the trail. Multiple street crossings. But they all have pedestrian activated lights and drivers are respectful and stop.

Sat Sep 22 2018

Perfect jogging route if you prefer a paved path. Very gentle inclines. Very well maintained. Not at all crowded on a beautiful Saturday afternoon. There are benches and fences at intervals that are handy for stretching. Road crossings have signals that give crossers the right of way. I parked in the municipal lot on Jefferson St. behind Kelleher Field.

road biking
Mon Jun 11 2018

Great for the beginners . It’s about 8 miles back and forth . Beautiful view along the trail

road biking
Tue May 22 2018

Parking in Marlborough is on Jefferson Street across the street from Kelleher Field. Walk down a small hill to trail. There are at least 12 parking spots.

Wed Mar 14 2018

Diggin' this rail trail! I grew up in Hudson and even got to watch the building of some of this trail. It's great for a long walk, a jog or bike ride. And it's beautifully scenic as it scrolls along the Assabet River and through the ever-growing downtown Hudson area and into Marlborough. Worth the hike, check it out. (Park in Hudson. No parking reported in Marlborough.)

road biking
Wed Oct 04 2017

This trail was a surprise in a good way. It takes you through the bustle of Marlborough and Hudson. The many stops to cross busy roads will slow you down. However, it has many little treasures to make it unique. There is a scenic view overlooking Fort Meadow Reservoir, sections of wooded areas, a tunnel mural, and art along the Hudson section of the trail. I parked on Jefferson Street in Marlborough in the Kelleher parking lot across from Kelleher Field. There are at least eight spots and the trail is RIGHT there. Will definitely explore this trail again.

Sun Jul 16 2017

Short and sweet. Nice elevation gain. Good quick workout on the bicycle.

Sun Feb 26 2017

nice easy walk. passes a few roads so not always as quiet as I would like. a bit short.

road biking
Tue Oct 25 2016

Decent bike path. Wish it was longer.

Fri Sep 30 2016

Paved bike path. Be prepared to see a lot of Marlboro & Hudson. I didn't see any parking on the Marlboro side where directions take you, ended up Peking t hospital bed walking 1/4 mile down. Lots of parking on Hudson end on Main St.

Sun May 29 2016

Great family ride. Easy access through street crossings. Nice paved trail.

Sun Nov 22 2015

more of a bike trail

Mon Aug 31 2015

I'm not a biker but i thoroughly enjoy running on this trail. It is clean and paved and also marked you can tell how far you've run.

mountain biking
Thu Sep 18 2014

This is listed as a mountain biking trail, but it is completely paved. A fine trail for cruisers and hybrids, but too slow for road bikes, and there are no mountain biking sections.

1 day ago

6 days ago

road biking
7 days ago

8 days ago

recorded Assabet River Rail Trail

9 days ago

road biking
15 days ago

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