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Running trails in Merrimack, NH
Merrimack has 8 trails in the directory — 1 on crushed gravel or dirt, 2 loops that return to the trailhead, 2 shaded, and 2 open 24 hours. 7 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 2,425 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.
Twin Bridge Park
4.7 ★★★★★ 797 reviews
Public park with a playground, picnic tables, baseball field, and a brook with a walkway.
Wildcat Conservation Area
4.7 ★★★★★ 575 reviews
Family-friendly hiking spot offering well-maintained trails and views of waterfalls.
Horse Hill Nature Preserve
4.7 ★★★★★ 355 reviews
Over 560 acres of elevated terrain & wetlands with trails for hiking, biking & horseback riding.
Watson Park
4.2 ★★★★☆ 132 reviews
City park with picnic areas, sand volleyball courts, a grassy field, and a trail, plus swimming.
Gateway Trail
4.6 ★★★★★ 116 reviews
Hiking area featuring trails with varying difficulty levels and scenic views.
Veterans Memorial Park Merrimack NH
4.4 ★★★★☆ 86 reviews
Relaxed park offering walking paths and picnic spots, along with baseball fields and a playground.
Grater Woods
4.8 ★★★★★ 16 reviews
No trails match those filters.
How to pick a trail in Merrimack
- Match the surface to your legs. Most of what's here is natural surface (1 of 8). 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. 2 trails in Merrimack are open 24 hours — the rest can sit inside a park that gates at dusk and doesn't unlock until well after sunrise. 7 of the 8 listings carry posted opening hours — worth a look before you set an alarm. 1 is lit, which is what you want for winter evenings.
- Long run? Check water and restrooms first. 7 have trailhead parking and 3 have restrooms in Merrimack. Anything over an hour and those stop being nice-to-haves — and in summer, shade counts double.
- The small things that decide it. 2 shaded, 2 with mile markers, 2 that runners describe as quiet, 5 dog-friendly, and 1 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 Merrimack trails by type
Running trails near Merrimack
Worth the short drive — the closest towns with trails in the directory.