Nashua River Rail Trail


Rt. 2A, Ayer, MA 01432
Dogs Allowed



Explore the great outdoors along this 11 mile bike trail. During the fall months, enjoy the bright colors as the leaves change. Don't want to bike? The trail is also open to walking, rollerblading and horseback riding.


Sunrise to sunset


Parking areas for access to the trail are located in Ayer, Groton, and Dunstable. 

Ayer Center parking lot (60 paved spaces)

Take Rte. 2 east or west to exit 38B, then follow Route 111 north to Ayer Rotary. Go halfway around rotary to Rte. 2A. On Rte. 2A turn right after Ayer Center, take first right on Groton Street to trail parking lot on the right.

Groton Center parking (Court Street 10-15 spaces)

Take I-495 north or south to exit 31, then Rte. 119 west approximately seven miles to Groton Center. Take left at Station Ave. to the on-street parking area beside the trail.

Groton Sand Hill Road parking (10-15 gravel spaces)

Take I-495 north or south to exit 31, then Rte. 119 west approximately ten miles. Take a right on Nod Road and right on Sand Hill Road. Follow Sand Hill Road to parking area on the right after crossing rail trail.

Dunstable state line parking (10 gravel spaces)

Take Rte. 3 to Exit 35, then Rte. 113 west beyond Dunstable Center. Take right on Hollis Street to New Hampshire state line. Parking is on the left.


Three boys biking along a paved bike path.


Ride along a former railway and enjoy scenic overviews and wildlife.


  • Restrooms
  • Scenic viewing area


  • Biking
  • Cross-country skiing
  • Fishing
  • Horseback riding
  • Inline skating
  • Rollerblading
  • Walking


  • Accessible bike path


  • No alcohol
  • No littering

More info

Trail etiquette

  • Be courteous of other path users.
  • Keep right unless passing.
  • Stop at all stop signs.
  • Trail is open dawn to dusk. If you have appropriate lights, ride at your on risk.
  • Give a clear and audible signal before passing and pass only when it's safe to.
  • Travel at a reasonable speed.
  • Wear protective headgear. This is required by law for children 16 years and younger, but recommended for all.
  • Respect private property next to the trail. 
  • Carry in, carry out all trash and belongings.


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