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Running trails in Groton, MA
Groton has 11 trails in the directory — 4 on crushed gravel or dirt, 2 loops that return to the trailhead, and 1 open 24 hours. 6 of them post opening hours, so you can check the gate before an early start. They're ranked here by rating weighted by review volume, across 412 Google reviews. Filter by surface, loop, distance, shade or lighting to get to the run you're actually planning — no made-up difficulty score, just the facts you'd check before driving out.
Groton Town Forest
4.7 ★★★★★ 103 reviews
Park, forest with a river featuring hiking and biking trails, plus dog-friendly paths.
J. Harry Rich State Forest
4.6 ★★★★★ 80 reviews
Hiking trails run along the Nashua River at this park with picnic tables.
Mass Audubon's Rocky Hill Wildlife Sanctuary
4.2 ★★★★☆ 58 reviews
Trails wind past caves, rock formations and boulders, as well as swamps.
John Tinker Accessible Trail
4.5 ★★★★★ 46 reviews
Flat walking area featuring stone benches, picnic tables and wooded trails.
The Groton Hunt
4.8 ★★★★★ 43 reviews
Dog-friendly area for leisurely hikes, trail walks, and dog-walking.
Nashua River Rail Trail - Smith St. Access
4.8 ★★★★★ 20 reviews
Groton Trails Committee
3 ★★★☆☆ 2 reviews
No trails match those filters.
How to pick a trail in Groton
- Match the surface to your legs. Groton gives you a choice: 3 natural surface, 1 crushed gravel, and 1 mixed. Asphalt and concrete are fast, predictable and runnable year-round but the least forgiving; crushed limestone and dirt take the sting out of high mileage; boardwalk is flat and scenic but slick in the wet. If your shins or knees are complaining, the fix that actually works is varying the surface you run on rather than chasing one "best" one. More natural surface trails →
- Loop or out-and-back? 2 trails here are loops, so you finish back at the car with no backtracking — the easiest way to run a set distance without thinking about it. On an out-and-back you turn round at half your target distance, which makes any trail fit any run.
- Check the hours before a 6am run. 1 trail in Groton is open 24 hours — the rest can sit inside a park that gates at dusk and doesn't unlock until well after sunrise. 6 of the 11 listings carry posted opening hours — worth a look before you set an alarm.
- Long run? Check water and restrooms first. 5 have trailhead parking in Groton. Anything over an hour and those stop being nice-to-haves — and in summer, shade counts double.
- The small things that decide it. 3 with mile markers, 1 that runners describe as quiet, 6 dog-friendly, and 2 smooth and wide enough for a stroller or a wheelchair. Busy or quiet isn't a good-or-bad thing here: a busy path is the safer choice for a solo run at dawn, a quiet one is better for intervals.
More on all of this in the trail-running guides.
Browse Groton trails by type
Running trails near Groton
Worth the short drive — the closest towns with trails in the directory.